I hate, hate, hate, hate, HATE goodbyes!
I have no problem if it's one on one, or even a group of maybe 3 or 4 people. Usually I just say "I'm out guys, see ya later" and do a solute or hand wave. My problems are at parties or at family gatherings.
Parties are just a mess, cause there's some people you know and are on a hugs basis with so you hug them, but then there's other people you feel more comfortable shaking hands with so you do that, and then there's like one or two people you just don't know and I have no idea wtf do do there. It's also weird if the one or two people I don't know are leaving and they know everybody else and hug them goodbye and then it gets to me and we just sort of avoid eachother. I would often times just sneak out of a party, get in my car, and take off, figuring nobody would know cause they're all drunk and there's a ton of people there. Then I get calls like "dude are you coming back? Why did you just leave like that" and then everybody things I'm rude. I was known as the sneaker for a while, but I've stopped that now, I just suck it up and get awkward.
Then family gatherings are horrible for me too. When I was little, everyone kissed everyone else goodbye all the time. Then when I was going through my teenage years, I became uncomfortable kissing the guys in my family (my dad, brother, brother-in-law) so I put a stop to that and just gave hugs. I kept up with my nephew cause he was just a child so he might not have understood me and felt neglected. Then my nephew and niece both entered their teenage years and I quit kissing them and converted to hugs cause they would understand and may have felt the same way. These days I only kiss the older ladies in the family and everybody else gets hugs but I still hate the goodbye in general, and I really hate it when somebody brings a date cause then everybody hugs them but I feel really weird about that. I spend the whole gathering sometimes just dreading that one moment at the end.