Is my ex boyfriend dangerous?

Okay, so I've never really done anything like this before. I just don't know what else to do and I figured an outside perspective could help.

So, here's the story.

Let's call my ex 'A'. Last month, I reconnected with A as a friend because he'd disappeared from everyone for a while. He was getting his head together as he has mild Autism, ADHD and BPD (Bipolar disorder.) Anyways, he'd been off his medication for a while which is why he'd gone pretty loco.

Now, up until this point, I'd only seen A as a friend and that's it. So when he popped up into our friendship circle again, I was happy to see him but a bit apprehensive considering the last time I'd seen him, he was throwing a glass at his girlfriend and trashing my friend's house (house party) and punching the wall until his knuckles bled. The BPD must have been pretty strong at this point. This was about six months ago by the way. I'd already seen how crazy he can get.

He seemed to have changed. There was none of that craziness. I was getting the vibe that he was into me but I didn't give it much thought until when I'd gotten home, I got a message from him on Facebook saying "Did you get home alright?"

So we had a pretty normal conversation when suddenly I get a message from my best friend saying "Look, I know what A was like in the past but he's promised he's changed and we can even see how much he has. He'll treat you like a f*cking princess, and you need that."

The wise idea would have been to end it there, maybe throw my phone in a vat of acid to avoid the looming relationship. But like a kitten lapping a bowl of milk, I dived into it with both hands. Before I'd gotten with A, I'd been involved with this guy who didn't see me as relationship material and wanted to keep me as a side bit. I'd ended things there and my self esteem was at rock bottom at this point.

And yet, someone wanted a RELATIONSHIP with me. Not a fuck buddy, not FWB's, an actual monogamous relationship. It seemed too good to be true. So I acted on impulse, and when A admitted he had feelings for me and asked if he wanted to give it a go, I went for it.

Now this relationship was really good up until 4 days in. He told me he'd fallen in love with me. So I kissed him, and avoided saying anything back. Then he and my best friend went to the shop to get a drink - and apparently also a breakdown. He panicked because I hadn't told him that I loved him back so by the time they got back, she took me aside and told me. I felt really pressured.

So A runs over to me, picks me up and says "I love you" again. I felt forced to say it back.

Day afterwards:

10, 20 calls a day. Endless texts. I felt so trapped but I didn't know to get out. A couple days later, he introduced me to his parents. A couple of days after that, I stayed over at his for the night. In the middle of the night, I got up to pee when his arm latched onto me like steel and he started mumbling in his sleep. Then I realised it was directed at me.

"I'll never let you go. You're mine for life now. I'll kill anyone who tries to take you."

So I shoved him and he woke up, no idea what he'd been saying.

He was very intense, and he had bad moodswings. I felt myself being on edge around him, afraid to say the wrong thing in case I set him off. I was becoming afraid of him. He's a lot taller than I am, and stronger too. And boy, he had a temper.

I'd been his fixation for over six months, and finally getting me was a huge thing for him. He wanted me, to touch me, to kiss me, to grope me, to hold me, to smother me. He constantly wanted blowjobs, handjobs, grinding, dry humping, fingering. During our relationship, he had roughly 20 orgasms. Me? None.

He loved to have me on top of him when we were dry humping because he liked watching me. Also, whenever I was on the phone to somebody, he'd bend me over whatever he could find and start humping me, pulling my hair back. It got really inappropriate, especially when I was talking to family. I told him to stop but he wouldn't.

By the second week, I texted him saying I needed a few days of space and instead of listening to me, he revved up, panicking that I was leaving him, even more texting, checking where I was and if he could see me yet. It wasn't cute anymore. I was trapped and I wanted out. He made me feel like I wasn't allowed to leave him, like I was his property now.

Fast forward a few days. I invite him to my house to chill. I make a pizza and I put it on the couch, and I lean over to grab a slice and he thinks I'm going for his dick. I gesture at the pizza. What does he do? Puts his hood up, earphones in and faces away from me. So I get up to move and he grabs me and sort of forces me to cuddle him. I stay rigid so he sighs very loudly and says "I'm going to meet *friend*. You better be out of this shit mood when I get back."

By this point I've had enough. I break up with him later that day over text. I said I wasn't ready for this level of intimacy with someone and he should be with someone who wants the same kind of relationship that he does. He didn't go mad or anything, like I was expecting. The opposite, actually. He begs and pleads with me to take him back. I didn't.

For some reason, he fixated on my Dad. He knew my Dad didn't like us being together because he's quite strict with relationships. (I don't live with him though) and he started saying he'd tell my Dad to fuck off, not to listen to him and kept telling me "I know you love me, I know you don't want to do this." I had about 40 missed calls from when he'd tried to ring me none stop after I ended things. I was too afraid to pick up the phone.

Fast forward to now. It's been a week since we broke up. Normally, you don't speak after a break up, right? Well, not in this case. 6 out of 7 days he's messaged me, weird things too. He mentioned he's "Going to the gym" and "Getting soooo fit now." Then he asked me how my Dad was, eerily enough. Then he asked why I ended things. I was honest and he didn't take it well. But he continued to message me, regardless. Then he decides to suggest us being fuck buddies. We didn't have sex during the relationship. I know what he wants from me. I keep my cool, as I have been doing all this time and ignore it.

Then he apologises today.

He's trying to get a rise out of me, emotion. It's driving him crazy that he can't get anything. His behaviour's turning stalkerish. He won't give me space. And now my friend has warned me that he's soon he'll end up looking for me, when I'm alone. He can't let me go. Considering his extreme behaviour in the past with his ex girlfriends, I'm scared he's going to try and attack me, or rape me. He wanted sex from me, badly. He's wanted me sexually for over a year and he came so close to getting it, he can't bear it now.

What do I do, is it normal community? How do I handle this? And do you think he's dangerous?