It's okay; we all need to vent at times.
  I've always been one to wait for the storm to pass, although there are a few things I do when I can't stand being alone. Sometimes I'll hop from table to table at lunch to see if there's anyone I could hang out with there, although I've only gone to private and charter schools so it might be different depending on where you are. I also have an easier time than others with adapting my personality to fit the people I hang out with, but to even it out I freak out very easily and have a hard time trusting people... I'm a bit socially strange, so it really depends on how you react to new people.
   Another thing I find helpful is journaling, and typically every night for about five or ten minutes I'll just write everything that is going on through my mind at that time about that day (or the past few days if I haven't wrote in a while). I do try to keep mine in chronological order with the main things that make me itch having the most details. It doesn't work all the time, although even if no one will read a diary or journal it can be nice to have vented yourself out through a pen. (Side note: There have been times where I started with a negative attitude in my writing, but by the end of it I had a positive outlook on the day because I moved on to the rest of the day and saw all the happier little things)
   There's probably more that I do to help the storm pass, but I can't really think right now. Considering that I'm wired a bit differently than most people my age some of this may or may not work.
   (Sorry it took a while to respond. I've been sick since Wednesday with the flu and had a hard time sitting up from bed until today.)