What do I do if I don’t like my boyfriend’s friends?

Not all of them! Some of them I like. But there’s just the few that really get on my nerves and I feel uneasy around them. Some of them have personalities that are hard to deal with. Immature, bossy, self-victimizing. I’m not perfect but geez it gets to a point. Also I make it obvious I don’t like to be touched but one of them touched me in a way that made me extremely uncomfortable (which is something I will tell him even if I don’t mention the whole ‘not liking his friends’ part). They encourage bad habits in him like smoking, drinking, and going to dangerous places while under the influence. I try to push him into healthy habits and it’s like all my efforts get stomped all over. They’re very close so it would be like telling him I don’t like his siblings. He’s such a kind and patient person but I worry that I’d cause problems if I told him what I was feeling. Any tips on how to handle this in the healthiest and least problematic way?
At the end of the day it’s his choice who he hangs around and what he does. But I want to find a middle ground where we can both be comfortable.

What do I do if I don’t like my boyfriend’s friends?
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