I remember I was very selfish my first New Years Eve at home. Had a big drinking party planned for the night with friends over. I made an appearance and then retreated to the bedroom around 8pm. Everyone kept asking me what was wrong, and I just told them I didn't feel like partying that night, and wanted to read a good book. Selfish, I know, but it is what I had to do to keep my sobriety in check. Not everyone will understand, but if they are your friends, they'll leave you alone if you need to do something similar.
