Are guys bothered by flirtatious behavior?

I think you should make sure that you give other guys a light, quick hug but your boyfriend a much tighter, intimate hug. That way you are showing that you have two styles - one for those who aren't your man and one for him. Back when I was in high school my debate partner and I would give each other a "Republican hug" after a tourney success - consisted of arms fully outstretched, quick hand pat on each other's shoulders, and no real contact. It was a joke. Something less extreme, but clearly different, lets your guy know it's nothing, sort of like a peck on the cheek compared to a real kiss.

I doubt he's okay with it. Plus, as sexwiseman noted, you're encouraging these other guys to think you are interested in them. I am fairly sure the guys you are hugging aren't thinking it's a family thing.

Interesting---the way you phrased your sentence, you're associating your excessive hugging to your flirtatious side. If that's the case, as the other responder said, you need to tone it down, because I'm pretty sure it wouldn't be cool if your bf was flirtatious, and he started hugging other girls excessively. Also, you have to remember that In today's world people don't respect relationships. For example, I once had an ex, and while I was away working the night shift, my roommate who I thought was a friend of mine, tried to 'pick up' my ex. Good thing she wasn't one of those easy girls out there, but supposedly, his excuse for trying to 'pick her up' was that she was 'coming onto him', as he said she was being over friendly. So my point is that best to keep it safe and tone down the flirtatious side because it could be a bit disrespectful to your boyfriend.

Since you admit you're kind of excessive it'd be considerate of you to tone it down, but if he says he doesn't care and his actions support his words, then he is a secure person and really doesn't care :)