<human>: Could you distill the essence of the text into 1-3 sentences?

I borrowed his phone and I saw that his ex texted him so I opened it and saw a whole conversation and I didn't even know they were talking in the first place (spread out over a few months). 

She texted him that she still wears the scarf he bought her and he said, "I still wear the shirt you got me at that concert! :)" It just kind of icked me out to see that and then I saw that they said "Happy Thanksgiving" to each other and he said,"Maybe I will see you around, maybe I won't, who knows..." and he doesn't like me hanging out with other guys and this REALLY pissed me off because it feels like such a double standard. I think it's fine to be friends with his ex, but I don't like them exchanging these personal messages. I also found messages where he was texting her about my depression (only a few where he mentioned I may transfer schools) and that really pissed me off because I don't like him sharing personal things about me without my permission. 

Also I don't like how he tried to prompt her to ask him to hang out instead of being up front so he didn't have to take responsibility so he could be all, "My ex asked me to hang out. Is that OK?" and play it off like it was her idea. This whole thing made me feel jealous and annoyed. I haven't said anything to him. Am I out of line for being annoyed about this?
<bot>: Boyfriend texts his ex sweet, personal messages and indirectly asked to hang out, and also talked about me. I am annoyed.