I just really ride it out and avoid any sort of interaction with other human beings..
..which is practically what I do all day everyday, I just kinda avoid people. But I'm talking staying-in-room all day kind of avoiding.
When I have to go out though, things get a little bit trickier. I usually just try to hide my feelings and be as fine as possible until the feeling is gone completely. Nobody likes seeing a grown man complaining and being sad all day.