Do you think its wrong of someone's boyfriend or girlfriend to subject their partner to being around an ex?

We've been going out for almost 2 years now, at the beginning of our relationship he acted like him and his ex (who he went out with for a year around the end of highschool) were "best friends" and he would talk about her pretty often, I really hated it, I thought maybe he still had feelings for her or something. When I finally met her I found that she was a pretty nice girl and acted very kindly to me, but I was still a little suspicious of her.

My bf wouldn't see the girl (ex) that often, however when he would I'd usually be with him and I'd start feeling so anxious I would almost get sick, it just made me feel so weird because I've never been in such a situation before. I used to really hate that he kept in touch with her and just wanted her out of his (and my) life, but after a while I figured that wouldn't happen and she would keep popping in and out occasionally. 

So to fix this awkward issue, I decided a few months ago to just try being friendly to my bf's ex and maybe become friends. I'd rather have a friend than an enemy, but is this the right thing to do?
user
My bf keeps in touch with his ex, I decided to try and start
assistant
Do you think its wrong of someone's boyfriend or girlfriend to subject their partner to being around an ex?

We've been going out for almost 2 years now, at the beginning of our relationship he acted like him and his ex (who he went out with for a year around the end of highschool) were "best friends" and he would talk about her pretty often, I really hated it, I thought maybe he still had feelings for her or something. When I finally met her I found that she was a pretty nice girl and acted very kindly to me, but I was still a little suspicious of her.

My bf wouldn't see the girl (ex) that often, however when he would I'd usually be with him and I'd start feeling so anxious I would almost get sick, it just made me feel so weird because I've never been in such a situation before. I used to really hate that he kept in touch with her and just wanted her out of his (and my) life, but after a while I figured that wouldn't happen and she would keep popping in and out occasionally. 

So to fix this awkward issue, I decided a few months ago to just try being friendly to my bf's ex and maybe become friends. I'd rather have a friend than an enemy, but is this the right thing to do?
user
My boyfriend is friends with his ex, who he went out with for a
assistant