Quote:
About your girlfriend: "I give her zero reason to doubt my loyalty."
Then...
About this other girl: "Anyway one thing led to another and we ended up sleeping together"
To be honest with you, you've made a big mistake, because if this new girl is as cool as you think, well even if you get into a relationship with her, you've planted a seed of doubt in the back of her mind, that if she doesn't realise now, it will eventually grow into the thought... 'wait a minute... this guy I'm with right now.. I was the girl he cheated on his girlfriend with..... he cheated on his girlfriend..... he's a cheater.... what.... what about me.... will he cheat on me?.... has he cheated on me?"
Trust me, I was that girl at one point, I started to go out with guy and got paranoid and realized it's possible that he's cheating on me too. Eventually I dumped him because I felt I couldn't trust him.
So by doing what you did, you've just recreated the same situation with different person lol
I had a 3 year relationship with a girl I met at a party.She was with her boyfriend. Cheated on him with me right there. I never had a single moment of doubt about her loyalty to me and just took it as a compliment for myself.
Getting paranoid is both you fault for thinking like you did and maybe his for not giving you reasons to trust. In any case , doesn't mean it will be the same for them. Stop generalizing , it's the worst possible way to think things through.
Want my advice , OP ?
If you want a healthy and successful relationship the only way you're ever going to have it is if both you and the person you're with actually put some effort into it. There's nothing wrong in a little flirting on occasion , but you have to draw certain lines and not cross them.
You don't seem to have that kind of relationship here and finding someone like that is rare.You'll know it when you get there.