<human>: Condense the text into a few key points

Throwaway I (f 20) have been in a relationship with him (23) for about 5 months now, been friends before that.

His ex went through a rough breakup and they stopped talking to each other completely around December. His ex hates me probably due to the fact she isn't over him yet. A few weeks ago they started talking and were planning to meet up over email (she wanted to visit him while he had his wisdom teeth out and see his family) That day she attacked me over his computer and when I called him to figure out what was going on, she was yelling at me in the background telling me to go to hell and whatnot. My boyfriend, being dazed on painkillers I guess wasn't thinking about it but he kicked her out when I told him to. I've told him countless times shes a negative person who is fucking with his past emotions to try and get him back and various others have talked to him about it as well. I find out she is now on his steam too and it makes me sick to my stomach even thinking about all of this. I have been having anxiety attacks over it.

Basically: I love the kid. He's going through some rough times with his depression right now (he's on his medication, he just finds this time of year to be troubling for him) But I just can't handle the fact he's talking to her again and I'm getting these anxiety attacks over it. When I talk to him, he says they are just friends and I need to calm down. Normally I'd be fine with being friends with exs but she is just completely crazy and is clearly not over him yet. I can't handle not being in control over this situation.

What I am thinking of doing right now is backing off a bit because I basically live at his house. I really don't want to have to make him chose but I think I'm going to have to.

I could really use some help with this.
<bot>: Boyfriend has started talking to his ex again who is manipulative and hates me, making me have anxiety attacks. Any help?