I don't know if this goes beyond BPD but it still hurts like hell.

 In our relationship he was friends with her to begin with but I found it weird so asked him to stop seeing her, he'd did after a while. 

We recently broke up, about a week ago and we haven't spoken for 2 days, and we live really close by so it's hard to not see each others houses. But every time I go past his house, her car is there and I just feel so betrayed. I know he is allowed to see her but it still hurts me to the core.

I was walking my dog late at night and went past his and saw the cars there and I spiralled, I'm feeling better now and was just wondering if this has happened to anyone and if anyone can give me advice on how to cope with it??

Thanks