Should i really feel annoyed by this? i feel like that clingy ex.

I had this long distance girlfriend. I really did care about her, but after a while I just couldnt handle it. I made her cry a lot, I felt like a shitty boyfriend. I hated having the "taken" status, but couldnt actually hold her, kiss her, etc. Or even see her face to face. She couldnt be with me, I felt tied down but couldnt enjoy what I was tied to. I felt like a lot of our fights and arguements couldve been solved a lot easier if we just could be with each other. So after a while..I broke it off with her. We stayed friends, and we agreed that if, by the time we can afford to meet again, and had not met anyone, we would date. I still cared about her in a close friend kinda way, but not really girlfriend way. Kind of inbetween...we still often exchanged I love yous, even broken up. But sometimes I'll say something like Goodnight, or I'm at work, then I love you. She would just reply with ok, alright, etc. So after a while I just wouldnt say I love you and just say goodnight or I'm at work. When I stopped, she asked why I stopped. I told her its because she never said it back and it made me feel weird. She often will do stuff like this. Many other times she'll start a conversation with me, then just reply with one word texts. But she'll get mad when I do that. Sometimes she'll reply with overly enthusiastic words, and I can tell she doesnt feel like talking. Or just doesnt care. So..I'll just stop texting her for that time. Didnt bother me, I feel that way with a lot of friends sometimes, even close ones. But then she'll ask if I'm just going to ignore her then. She admitted she often likes to make it seem like she hates me or just doesnt give a damn about me just to see how I react. After we broke up, we still exchanged pics and sometimes videos. nudes. We agreed to only recieve from each other. While in a group call I said this girl is mad at me because I screenshotted her snapchat she sent me in her panties. I couldnt help it. Tonight she told me I broke our agreement, and to delete everything I got from her. I told her I didnt really care for the screenshot..just wouldve regretted not screenshotting it. I'm not saying I didnt break the agreement. I did. But after I did as she asked, I said Goodnight. She replied with bye, and I said that feels like you wont want to talk to me again now. She said maybe she will, out of boredom. And that just really annoyed me. I dont know why.

Sorry for wall of text ._.