Hey, very recently I went clubbing with my girlfriend of 3 years and a couple of friends’ friends.

She and I have been wanting to explore a third person for a long time and we decided to go home with one of the friends’ friends, I’ll call him V.

Note: I’m aware of the risks involved in including a third person, I don’t need to be told that or judged for it.

After having a few drinks, my girlfriend was very very drunk and we all had our time together and I was fine, but the problem is when we were going to bed together (sleeping).

I was laying there and found them kissing, and touching each other. I later there quietly thinking ok, this is ok. But then they continued without including me. It was only when V said.

“Hey, we really shouldn’t be doing this because RubySapphire is asleep.”

I was shocked that they were doing all this thinking I was asleep. I felt betrayed by my girlfriend when she asked if I was asleep and that she didn’t consider me for a moment. Only V did.

I told them I was awake and V tried to make the moves on me, I rejected him. Telling him I wasn’t in the mood. They both kissed a bit again and then he asked me to leave the room so he could have sex with my girlfriend.

I said yes it was okay because I felt I was holding them back, before leaving to a spare room. Half an hour passed until my girlfriend bothered to check on me.

This isn’t the first time boundaries have been stepped over, at a party I wasn’t at, she flirted with a man while drunk and our friend pulled her away from him.
The next day, my girlfriend confessed this to me.

I’m always concerned I am overreacting, I want to hear people’s opinions on it. Am I? Or am I right that I’m not being put first at all?