<human>: Can you condense the text into a few key points?

My girlfriend and I are quickly moving towards getting engaged, we've talked a lot about it and both want to. I want to propose soon, but I'm incredibly self conscious about the fact that I don't really know anybody well enough to ask them to be my Best Man.

I haven't made a ton of close friends since leaving high school, and since moving away from my hometown at 19 I've gradually fallen out of regular contact with my good friends from those years. I have some friends, but nobody that wouldn't, I imagine, feel incredibly uncomfortable were I to ask them to be my Best Man. I don't have any brothers, so that's a non-starter. My girlfriend is honestly my best and closest friend and confidante. I haven't felt the need to seek out a male friend to fill that role, I guess?

I'm obviously not going to let this stop me from proposing, but I feel like I'm in a pretty awkward situation and I legitimately have no idea what to do!
<bot>: I don't know anybody well enough to ask them to be my best man. Don't know how this is gonna work without it being super awkward one way or the other.