I have a problem..it's slightly large, help?

[colossalbrain331]

I have just started uni and my girlfriend is around 4-5 hours away from me at hers. She doesn't trust me with other girls as I've cheated in the past but I have proven over the past 2 years that she can trust me but she won't let me even talk to girls or add them on facebook.

I have recently made friends with a girl in my class and the way I see things we're both kind of into eachother, she knows I have a girlfriend and we're still getting on really well, better than the other guys we hang around with.

My problem is this, I really like this girl but feel bad about having these feelings because of my girlfriend (Who I visit every 2 weeks or so). On the other hand I have a feeling in my stomach that she'd cheat if given the chance, one guy from her house said that he slept with her and she told me he was just joking around to be one of the 'lads' but I don't know if I believe it or not

What should I do about this, I love my girlfriend but I'm having really strong feelings for this girl that I've just started to get along with on my course and am really confused as to what I should do. Help please.