<human>: So this story has various parts to it, and some things I'm not proud of, but it happened.

The best way to explain this is that I end up liking someone and then I hate to see them with other people or hanging around others. This seems normal but it's different to like liking them, I don't feel a want for sex or even a relationship with them, but the rest of it sounds like it.

The worst part is that it happens all the time and from people anywhere, online in person or from another place, and I'm in a relationship. 

I "liked" this one girl from Austria, but I was with my now ex-girlfriend at the time. Nothing came of it, and it wasn't like I loved my ex anyless or acted any different to her, I didn't like like the Austrian girl either, but when she got a boyfriend, I dudunno, I just sank.

Another was this Italian girl who moved to where I lived and we had some of the same classes. She was closest to the like like spectrum out of everyone. I was still in that relationship with my ex, but still had no desire to have sex or cheat or anything, but when she talked ababout her crush, I sank again.

I've moved to.uni, and made new friends, once being a girl this has happened too. I'm in a new relationship with my current gf of over a year, but this girl is the same as before, no desire for anything, but she's just got into a relationship with a guy (not that sure about it all, hee only likes her cuz she's Japanese and he lose anime, he got out a 3 yr relationship because the girl wanted to spend time with him, and he's only known the new girl about 2 weeks), and I feel sunk.

There's been other cases, but they seem minor compared to this.

Am I a terrible person? Is this as bad as cheating? How can I stop this or deal with it better?

Can you summarize the given text in a few sentences?
<bot>: I end up having emotional feelings for other girls while being in a relationship, but have no desire for anything with them, but freely sunk and bummed when they're not available anymore