Hi Matt M.
First of all chill out and don't ever get down on yourself for seeking out some annonymous advice, I think its really a smart thing to do.
I don't know how old you are, but here is my 2 cents and if it makes sense to you, it will give you something to work with.
I had issues with my dad when I was young. As an adult I found that when I met or worked with guys that reminded me of my dad in some way or shape, I noticed that my behavior changed and I kind of grew intimidated and a bit withdrawn. On some level they sensed something as well and kind of stayed away from me or were much more aggressive or nasty than normally. This threw me for a loop for the longest time until I realized vibes/energy is very real and they could feel I was really uncomfortable being around them even though they didnt know why. Another analogy you will relate to would be when an animal knows if a person is a lover or hater of animals. They know cause they can sense it, same way with people.
So if you were bullied at a young age, take another look and see if there is any connection to you being intimidated/behavior change in some way around a group of guys or how you relate one on one. If you see some connection here, recognize its not them but you. Once you realize you are giving off something and pushing guy friends away you can have something to work with and explore a bit further.
Stop drinking for a bit and be clean and sober when you look at yourself in order to get real. Alcohol is fine, but it does mask the stuff we are uncomfortable with, especially social stuff. If you sit in a chair, quietly and feel what comes up around these situations, you can recognize what it is and then dump it and be clear with yourself and the other potential friends you might meet in the future. Sorry this is so long.. Good luck
Wil