Not one for AIBU category, because I am (100%).
I can't get past his relationship, with his ex wife.
I'm not sure if it's because, he has experienced so many firsts with her or that he shares 3 children with her (we won't be having children).
We have been together for 3 years, he has been divorced longer.
I don't think he has any residual feelings towards her.
She can be a quite nasty towards me or about me, but that's ok. We don't need to interact. We don't have to be friendly.
The smallest things can set me off, like the fact that they are still "friends" on FB and he has some (very old) photos of them as a family, still on his FB.
If she contacts him about the children and deviates from the topic (fills him in on a bit of news), I will have an issue with it.
I'm obsessive, needy and really embarrassed by my behaviour.
Any advice would be appreciated.