Im a guy falling for my best friend whos a girl.......and i have gf?

so me and her have been so close of friends since last year my junior year of highschool shes always said im her bestie and all of our friends have always wondered bout us but its never been more then friends never! well this summer going into college weve been haning alot!!! so we go on this camping trip with our grade for a senior trip and she rides in my car and sleeps in my tent just us two well of course first night weve been drinkin we are the last ones up and something happens and yeah :/ second night same thing! on the ride home the following day she slept the whole time and all i did was think bout her and i finally started to realize i have feelings for this girl and i have just for the longest time so we text constantly when we get back to town which is a couple days ago and yesterday i finally told her how much i liked her and just this feelings have been holding in for so long and i just had to tell her and of course she feels the same way bout me ok next thing she leaves for coolege in 6 days i leave in 7 and i ****** have a gf of over a year im so god dam confused you have no idea like i thought of her as a sister now i wanna be with her!!!!! wtf