Is it normal that he has changed so much with me?

Sorry this is kind of long but I need help. I would like to know why he has been acting differently with me basically. I am 18 (19 in 2 months) and he is 27. The age difference never bothered us. I’ve known him for about 6 months now.
He started talking to me online and he liked me, but I didn’t like him at first. The more we talked he would tell me that he liked me. Soon he told me things that I felt weird about, like saying that he loved me, always thought about me, and then he said that he was in love with me and that I was his “little baby girl” (things like that). He would ask me if he could be my bf and I told him that I really didn’t want to date at the moment and I said maybe the next year (2013). I did start liking him though but I still didn’t feel ready.
On New Years he asked me again if we could date and I still said no and he said we shouldn’t talk anymore. I didn’t want that though because I knew I would want to date him soon and he told my friend that his feelings for me were growing more and more each day and that he didn’t see any point to keep talking to me. I told him I didn’t want that to happen and that I did like him. After that he would ask me every week when we would date and it always ended up as a fight between us. We did fight a lot and sometimes about others things. My feelings were growing for him at this point and I began liking him a lot.
Not that long after we had a fight about something; at the end of the fight he started talking about me needing to grow up and getting a job. I knew I did have to and then I told him I also needed to get an ID card made and he didn’t like that I didn’t have one already. He wanted me to get one made because he said he would probably get arrested if I was with him (I didn’t understand that). I told my mother I wanted to get one made and she said she would take me in a few weeks (turned into a month though) and he wanted me to get it fast basically. He wanted to take me himself to get one and my mother wanted to be the one to do it. He made such a huge fuss about it and we would fight a lot over it. A week later he wanted me to go snowboarding but I told him I don’t want to snowboard but I wanted to go just to be there with him. We were arguing about this at 5:30 am because he wanted me to get up early to go and he said if I didn’t go he would stop talking to me and seeing me. I said I wasn’t going because I didn’t want to snowboard and he said he would go back to sleep and go himself after. After that I was pretty much a wreck and had to talk to my friend about what had happened. She called it a “disaster” because she has never known me to cry and I was for a while. I was starting to feel better after a few hours and then he texts me back saying “Sorry, you there?” I was very upset but I knew I had to talk to him. He said he overslept and couldn’t go and then he said he only said that to me because he was “pissed.” I did go with him the following week and he let me stay in the lounge area. We also kiss and kind of act like a couple even though we aren’t.
A few weeks later he invited me to a concert and I stayed with him for 2 nights (nothing happened btw). I liked being there but he wasn’t happy that I didn’t nap with him in his room when he got home from work the next day. I didn’t know if I should have because he didn’t sleep the night before and I wanted him to be able to. When he dropped me off at home he said he didn’t think we would work. A little while after I texted him saying it would because we love each other and that I would start to grow up (even though all I really needed is a job & license).
About 2 weeks ago he wanted me to sleepover for the weekend. He said he missed me, wanted to see me, and spend time together. He also said he wanted me to lose my virginity to him and I said I didn’t know if I felt ready and he said “we will try it.” I wasn’t able to sleepover, my mother said not that weekend and maybe the next one (this past weekend). A few days later he had me call him to talk about it and I still said I didn’t feel ready. At the same time I was texting my friends and couldn’t concentrate in our phone conversation and he got mad so we hung up. Few days later I asked him what would happen afterwards if I lost it to him and I said “stop talking to me altogether?” He got mad cause I accused him of using me again (which I did before even though he said he wouldn’t but idk that for sure). Later we starting talking and I said I was sorry and then I asked if he would want to date me and he said “Yup I guess, its almost there.”
A few days ago we talked about it again and then I asked again what would happen afterwards and he said something like “If you don’t provide what others expect, someone else will” and “You think you have to lose it to your bf or get married. Its all bullshit.” I couldn’t believe he said that to me. Ever since then he has been cold and distant with me like he is after we have a fight and he hasn’t been saying “I love you” or calling me nicknames like he usually does. I did ask him if he loves me and misses me a few days ago and he said he does.
A few other things that are weird is that he told me before that sometimes he likes fighting with me because he likes me. He pulled up his photo album on his phone to ask me who the people were in my photo and I noticed that he had a bunch of my pictures which I had no idea about. We aren’t friends on Facebook either. He saves my friends numbers even though he hates most of them and I know he wouldn’t talk to them anyway. Sometimes if I don’t text him back within a certain amount of time he accuses me of kissing another guy, texting another guy, hugging, or even being with another guy. This has happened a few times and he tells me that he does trust me so idk why he would do this. He also told me that there is this girl that will have sex with him if he calls her and sometimes he tells me that he's going to have sex but idk if he's joking.
I want to know why he’s being like this. He was so different in the beginning and I miss that. He had also sent me a card and quotes in the mail; relationship and love quotes (just 2 months ago). He has changed his mind about dating me a few times now and everytime we fight now he tells me he wants to stop talking to me. My friends really do hate him and they have all said he is mean. I tell him when he is hurting me or making me sad and he tells me that's not what he's trying to do. Can anyone tell me what’s going on? And is this normal? If anyone needs to know anything else I will respond to you.