Guilty feeling in a 2 year relationship?

W W Asked: Guilty feeling in a 2 year relationship?

My girlfriend and I have been together for almost 2 and a half years. Both of us are third years in college and we've been long distance since the beginning (actually making it work). For those pessimists, our relationship is healthy:

-open communication (talk about literally everything, as you'll soon see)
-compatible living together (lived in HK for 6 months together while studying abroad)
-have opposite personalities but it clicks
-high trust and honesty
-no cheating issues or problems resulting in breakups and makeups

During Halloween, I went out and to a friend's party and met this girl (started going out a lot more this year after getting into my business school). I've met plenty of girls that just fade in into the back of my mind. She's nothing special, her personality doesn't click with mine and she's standoff-ish when we text/gchat but she's been stuck in my head. She initiated all the talking, something I wish I could just rewind and delete now. I've asked her to hangout several times and when we are about to, she just ditches. I have no intentions of wanting to date her, imho, it's probably physical attraction and a desire to be friends. But it seems the more standoff-ish she is, the more obsessed I get — similar to an unattainable new toy. I've done some serious self-analysis and I think I want to make her 'like' me for an ego boost which makes me sound like a complete douche.

Either way, it's really affecting my mentality about my relationship and I have been feeling really anxious for the past month. Everytime I talk to my girlfriend, I feel guilty about something. She knows about this girl and we try to evaluate why I feel like I have this "wall" blocking me from our natural and happy equilibrium. She always says, "I really don't take this seriously cause our relationship is strong. If anything is wrong, I know it's because you're changing and I respect that."

As of a day ago, we're on a break so I can figure this all out. The plan is to reconvene in two weeks but I'm pretty sure I won't last that long. It's such a struggle juggling between a girl who is ideal for me and the college single male entity inside me

I went to another quick pregame and she was there. We talked for a bit and when I left, this strange guilty feeling came back. I just want to block her out of my life but I find myself checking if she's online and wanting to chat her (but resist).

As usual, yahoo advice is always appreciated. Thanks guys.