Sorrowsunshine--
Welcome to A2K.
Consider this useful bit of philosophy from the Orient:
You cannot step into the same river twice.
The river banks remain constant, but the water in the river is constantly moving on, flowing to the sea.
Quote:But I feel so lost and neglected now. I haven't even seen her for like a week, because shes been hanging out with other people. I feel so isolated and lonely. And I feel jealous of her boyfriend, now taking up all her time, and me her BEST FRIEND and it seems she doesnt even give a damn
While you were out-of-state your girlfriend made an independent life for herself. Perhaps before the move the two of you were BEST FRIENDS, but she has changed in the time the two of you have been apart. She has new interests.
Did you move back to the area simply for her company?
As for her behavior at the party. Personally, I'm old fashioned enough to think that couples shouldn't get physical in other people's bedrooms during a party, but I don't run the world.
Your girlfriend and her boyfriend were very antisocial at this party, but you weren't exactly extending yourself to have a good time or to be sure other people had a good time. The lovebirds wanted to spend all the party time with each other. You wanted to spend all your time with them.
Why go to a party if you don't want to mix and mingle?
You felt abandoned and awkward, so you lost your temper with your girlfriend. Now she's showing you that she doesn't like being yelled at and she doesn't like you assuming that she's your exclusive possession.
Her behavior was a bit rude--more rude to the host/hostess than to you, but still rude. Your assumption that she was going to guarantee you a good time at the party was unrealistic.
Pick up the telephone and tell her that you're sorry you lost your temper.
Don't get into who was right or who was wrong--the past is over and done with.
Once you put a patch on your fraying friendship, make sure that patch will stay there. Find other friends and other interests so you won't be so dependent on your girlfriend--or on any other person.
If you can't count on yourself to be good company at a party, who can you count on?
Good luck.