I just found out my boyfriend emailed his ex
There is a dark history here- him and her had a very turbulent relationship, she was his first sexual partner.
They then went through a very rocky patch and I think they each ended up sleeping with other people.
Through all this, him and I were best friends.
And he confessed to having feelings for me. I refused because technically he already had a girlfriend.
However a few months later, they were pretty much over, she just hadn't moved out. We ended up having sex after a drunk night out (not classy, I know) and she moved out the day she found out.
However even after she moved out and him and I became a couple, she deliberately continued to cause a lot of problems in our relationship.
For example, she took her belongings to a park in the middle of the night and then sent him a selfie saying that she would risk her safety and stay there all night if he didn't come and get her.
He went looking for her in all the neighbouring parks.
This is just one example, she pulled several stunts like these.
So once she moved back to her home town, him and I had an agreement that he wouldn't ever contact her again for any reason.
There is a lot more to the story about how controlling she was and how dysfunctional their relationship was. He always said he wasn't happy with her, he didn't love her and the whole thing was toxic.
He said he didn't even think about it.
He just saw the calendar and the automatic reminder and emailed her.
I don't believe it and I'm thinking this is a betrayal enough for me to break up.
What's more, he told me when I asked about another related topic and I sensed something was off so I proved further.
I really don't think this is forgivable
AIBU?