So I’ve been dating my current girlfriend for about a year now and everything is going fine, we argue every now and again but that’s it. A few months ago I met this girl (who we’ll call Minty since that’s her nickname and I don’t want to use her real name) and we became good friends, she was very nice. Slowly I found myself becoming more and more interested in her romantically which made me feel extremely guilty since I was already in a relationship and still very attracted to my girlfriend. Minty is very affectionate both physically and verbally with her friends (by physically I mean she’s always keen for a hug and things like that). She’d always compliment people on little things and make sure they know they are important to her. Due to my feelings her little comments drove me crazy and weren’t helping at all and eventually I started matching her spirit and being very verbally affectionate back. She’s currently struggling with bipolar disorder so her feelings are easily played with and to top that off she’s just recently gotten out of a two year abusive relationship (mainly extreme verbal abuse) so I’m a little protective to say the least. 

About a week ago she got herself a girlfriend, I didn’t know the girl personally but some friends of mine told me she’s nice. I had this horrible feeling in my gut all day, at first I thought I was just being cautiously protective but after talking to my sister I’ve realised I’m very jealous. I feel absolutely terrible since it’s kinda like I’m cheating on my girlfriend in my head but mostly because my brain basically wants to keep this poor girl to myself without ever cutting ties with my gf. Am I a complete asshole for having these feelings?