GF troubles, Confidence shot.

I've learned alot of things on this site, and I thought I was putting them to good use. I'll try to keep this short.

Everything was going fine with my girlfriend, untill about a week after I returned from a 2-week vacation in England. I started taking night classes (6-9), and didnt see her as much. Anyway I invited her to a party, but it turned out to be a real let down. I felt a bit bad and when we were on our way home she decided that her and her friend (who was also there) were going to go to a party later that evening. Red flag? I'm not sure, but the fact that I wasn't invited, or that she never directly mentioned it to me (he friend told me) seemed off. But I parted ways with her and went home, without saying anything <--- mistake? probally.

Here's where things go bad, I didnt speak to her for about 2 days, and then found out she had been partying a few nights before all night. Now generally I don't care but the fact that she neglected to mention this to me...and tried to brush it off again seemed bad. A day or to later with no speaking I decided to call and see what was up. She told me that things were going really bad and that she had to think alot of things through. This really made me worried because she's never acted like this before.

Finnally I talk to her again and she explains her problems..etc but she mentioned how what was really bothering her was that she couldnt talk to her friend, at first I thought it was one of her friends from school, but it wasnt. Apparently it's some guy who got his car taken away and his parents wont let him talk to her anymore. I was completely shocked, angered, and I generally felt disrespected. I later found out from her best friend that she had been hanging out with two guys the night before. She was acting abnormally nice..but after further thought I realized that it could be guilt. Last night I called her and there was no reply, only to find out that she had went to the movies. (Not sure if it was the same guy again)

Cheating? It's hard for me to admit but that's the way it seems. I felt on top off the world a few weeks ago, but now it seems that all my confidence is just gone.

Any advice would be good.

Talk to her about it? Explain that I'm feeling disrespected, or is this just a lost cause?
End it today?

Screw another girl. Now.
She's cheating man. And she's disrespecting you.

Move on, lesson learned.

Why the hell is your confidence shot? You should be celebrating that your ending your relationship with a girl that is disrespecting you.

Grow some balls and move on, she already has.

If I were you I'd just meet her somewhere and end it. To make it even better, bring a date with you.

She's already cheating on you or she's about to. There's nothing else to consider -- don't make it complicated. Dump her. Now.

It's over dude...I been where you are, but atleast I knew when things were getting bad.

You have to remember an important fact about women. Their Attention span and memory is very SHORT TERM. They will never think back to when things were rosey red between you two until it is too late. When she is constantly being dogged by many guys she will realize that she had a good thing with you. By then hopefully you have moved on.

dump her. simple as that

i'm sorry to if this is a serious relationship. but if she won't event talk then it's best to end things if you feel like you can't deal
a girlfriend should never do things like that. it seems like she doesn't hold much respect for you at all

if she really cares then she'll be there. if not then she'll continue blowing you off for her friend

it's not easy. but don't let your confidence be put down by someone disrespecting you.

enjoy your life.

the girl sounds like shes not worth much, it might not seem like it to you at the moment but she is probably disrespectful and unloyal without a very high interest level in you. She's out enjoying herself with other guys and partying more than she is thinking about you.

if you dont want to dump her, then at least drop your interest level in her quickly and go on the lookout for new girls. First get your confidence back and then stop phoning and checking up on this girl, and dont be as available. If she comes around back to you after a while begging for interest then you can try again but if you continue with how things are now she will just continue to respect you less and less.

Remember you are too important and have too much self-respect to waste time and emotional stress with a girl thats out behind your back every night, no matter who she is. This reminds me of my ex when i was quite AFC and this started spontaneously and continued for a while and gets worst until she ends it unless you change things or end it first.