coke!!!!!!!! help

okay i was actually never gonna write this in here as im so ashamed of myself and didnt want you guys to think im trashy but its been eaten away at me and i had to tell sum 1,me and my friend were at another friends 18th saturday night now you remember i told yous i got back with my ex the night before well anyways me and my friend and boyfriend all had a bit too much to drink and a few people there were doing cocaine now i would never touch the stuff but unfortunatley i did including my friend and boyfriend then when it kinda hit us and we were all high we ended up havin a 3some,all i remember is waking up in my freinds bed the next day with her and my boyfriend now i was so freaked i cant even remember gettin upstairs!!!!! and i feel like shit i felt really dirty and now that the whole school knows about it my boyfreiends the stud in all of this and me and my friend are the sluts and im crying the whole time about this i really dont know what to do worse still id love to do coke again im not addicted surely?