Bf doesn’t know I had a train ran on me

I’m just gonna try and make this as short as possible. Me and a couple of friends were party hopping at ASU on Halloween. I only had a few drinks because I promised my boyfriend not to get drunk. After the party had ended it was 4AM, all my friends had left and it was just me and a couple of guys cleaning up. One of the guys offered to get everyone there and me ecstasy tablets for the fun of it, without hesitation I took one and felt like I was in a horny trance. I wanted to fuck every guy there in the room at that moment, and I did. About 8 guys had their way with me and I haven’t told my bf about it. The truth is tho I really don’t regret it I would do it again if I had the chance. Being used and passed around like a communal fleshlight really just felt right idk. It was the best sex of my life.