My girlfriend got drunk and made out with all of her friends at girls night!

My girlfriend got drunk and made out with all of her friends at girls night

My gf (F21) and I (M22) have been dating for 2.5 years now. We are very committed and planning on getting married once she graduates in the spring. Tonight was her girls night, so her and a couple of her friends went bar hopping then ended up at her place. I don't know what happened in between, but she did tell me that by the end of the night all of them were naked and making out. She's still over there and left me on read after she told me that, and I really don't know how to feel.

She is bisexual, so this does come across as a bit more than just having a little fun on a night out to me. I won't see her again until tomorrow evening because she said she had "unexpected plans" in the morning.

I'm honestly kind of freaking out as I'm typing this because I don't know how to respond. On one hand there's the typical horny man brain part of me that thinking "wow two girls kissing is hot," but on the other there's the part of me that's worried she may not be satisfied with me and is deciding to go against me for that reason.

This may just be my anxiety but I'm really freaking out here and could use some advice.