Was It All My Fault Or Was It My Boyfreinds Best Mates?

I started dating this guy and after being together for 6 days i had to go camping with the school and he wasn’t going. i was going with his best mate and this other guy that i knew liked me but i didn’t like him. Well my boyfriends best friend and the guy that liked me where sharing a tent and i had a room. they spent a lot of time in my room and asked me to go out to there tent with them for a bit so i did. we where sitting in there and they where trying to get me to snog the guy that liked me but i didn’t want to cus i had a bf. but i couldn’t get out the tent because they where twice as big as me and i couldn’t get passed them. so i said i’de kiss him but not snog. as i went in for the kiss he went in for the snog. then everyone on camp found out and my boyfriend dumped me. it was all his bestfriends fault as he also tryied touching me up. or is it all my fault ?