Boyfriend wants me to go out

He wants me to go out on the weekend with his new friends at his course. I would love to be that supportive girlfriend but I can't think of anything worse right now. FOR me, it will only end in excessive drinking, tears, angry jealous outbursts, resentment, a terrible hangover and a downward spiral that will take me a week to get out of. I've noticed this pattern. I know he will say he'll stick by me, but I know he will want to mingle with other people without me glued to him. I'm sure everyone will be nice but I'm the awkward quiet type and after a few drinks nobody wants to be smalltalking with that person. They would rather be comfortably getting rowdy with people they DO know well. Again, this is what I've observed as I'm the one sitting to the side watching everyone have fun while internally I want to jump off a bridge lol. ( as in escape and end this torture). He would have a better time without me there and I think I might just tell him I won't go.
But then I'll have to deal with the insecurities and jealousy knowing he's hanging out with pretty girls probably having a good time. I just manage when he talks about other girls at the course but actually SEEING him talking, playing drinking games, laughing and having a good time. That would be torture. I know thats selfish and controlling which is why I just don't want to go. I can drink as much as I want at home without having to be there in person seeing that. So, either way, i don't win and I have a miserable night.

Funny, that only two weeks ago I was thinking this relationship wasn't for me. yet, here I am, making out he is the most precious thing i could lose.

(((hugs))))))

I'm sure what ever you decide to do he will understand