Allegedly having sex with boss and all colleagues shunning me !

I have been working for about half a year, as a clerk in an office. At the beginning, my colleagues were very nice to me and included me in all activities, even outside working hours. However, this situation changed the day after the Christmas party. At the Christmas party, alcohol flowed in streams. Having no interest in getting senselessly drunk, I left the party early. My boss wanted to leave just as early to be with his family before midnight, so we left the company party at the same time. The next day, my colleagues at work behaved very distant towards me. During the lunch break, I plucked up my courage and asked a colleague if I was wrong about this and what...