Is AUTHOR wrong in the post ? POST : Girlfriend, Jane, and I are very serious, we’re talking about getting married this summer. 

Long story short she had this male friend since before our relationship, john. John confessed his love for Jane through a social media dm to me. I was uncomfortable but brushed it off. John was fine until one day he walked in her house without permission while we were in bed. They got in an argument and she took his key. Fast forward two weeks and john is over while I’m there. He heads out and locks the door behind him... she calls him back in and takes his apparent second key. 

I asked at the beginning if john and her had a past, she told me she kissed him once while they were drunk. I know I’m an asshole for doing this, but I went thru her phone and found out they had been together before her and I were. I told her immediately what I had done, but that I didn’t appreciate her lying. 

They still text and call daily, which makes me very uncomfortable. I’ve tried to express this to Jane but she doesn’t seem to get it. I am untrusting of john and it makes me occasionally untrusting of Jane. We’re planning on moving cross country in a few months, but I can’t handle him around now.. I just want him out. 