Boyfriend ex girlfriend.

For some reason, every time I see a girl he has dated or talked to/hooked up with I just get this wave of terrible anxiety that actually makes me physically sick to my stomach.

Specifically these two girls.

Keep in mind I have BPD. But I don’t know if that’s affecting the situation at all. I hate this because it makes me feel over dramatic and crazy.

His ex gf of 5 Years still texts him occasionally and most times he doesn’t answer or he 1 words her. He told me he doesn’t really wanna be her friend but he’s also not gonna be an asshole and just cut her off.

Ive explained the same situation to one of my friends and they told me essentially it’s something i am gonna have to deal with. But is that really the case? Do I just live with the fact my boyfriend won’t tell his ex of 5 years that cheated on him that he doesn’t really wanna be friends. He’s even told me he regrets being her friend. He knows I dont like her. So I really don’t know what to do. I’ve never told him to cut her off or anything because I’m not gonna control who he can be friends with but really I feel like this is a respect thing or no?

Sorry this turned into more ranty than anything. What should I do?