So for context with both have bpd, but are kinda different with it and it ended.   Ended worse because I got drunk and got so angry and enraged

Flash forward to now and I have a new relationship, it's going great and I recently apologised to the previous person. 

I just keep having conflicting thoughts and I don't know what to think.  On one hand I know deep down we were doomed , It would've never gone anywhere and would end. But on the other hand if I could go back in time I would

I wish I could think logically because I know I shouldn't keep thinking these things.