Overwhelming social stimuli.

I like to stay in my house too, but not at the same cringe levels as the OP at the office party.

I like to go out too, but sometimes I just need to get away for a little bit because having so many people in a crowded place can just be overstimulating.

I was at a New Years party 2 years ago, and we had about 30-35 people crammed into this person's house for 'white-elephant' and other games and such. I had to step outside for about 5 minutes after the first hour just to enjoy the chilling silence of the wintry outside. Everybody in there was just a little too much to hear, see, and interact with all at one time. I ended up leaving after about 3 hours.

Also, there just comes a point where a party dulls down and it's just people separating into small groups for talks and conversation, and party games are too far in between. The small group conversations are uninteresting or boring and involve people that I don't know, and don't really care to know either. It's like being bored in school; the time just drags along, nothing to really do. So I start to get "withdrawals" for my home activities/hobbies or seeing my interesting friends and doing stuff with them.

Na they are different.

Shaking guy was sharing his experience, then OP (pocket hentai) shared his.