Okay straight guys help me out a little ...?

been in your situation many times over. im straight and 18 . my girlfriend has alot of nice cute looking friends and i went to the beach i got a little drunk ped out in the car i woke up to one of her friend on top of me and touching me and blah blah blah i was alot i mean who wouldnt be but i kicked her out my car got my girl and went home. any way the chick was psycho too and what i do is try to avoid the idea i keep it secret not trying to aeem like an but ignore it