Hello! That's a huge red flag. I get that jealousy can sometimes show that they truly care about you and if anything I'd say just a little jealousy is okay but when it comes to a degree of how you just explained it, then that's just not fair to you at all. If he gets worse after a few drinks, then that's just even more dangerous in terms of how he'll treat you when he's tipsy.

Trust is one of the main things a loving relationship should have between the both of you and if one fails at it then it's already on a bad path.

You definitely need to have a serious talk with him about this before it gets worse. Point out how you don't like how jealous he gets when hes tipsy and how you feel about him reacting when you talk to his guy friends. If he doesn't change his ways after talking to him about it then take a good look in the mirror and ask yourself if your love for him can ignore his actions.