as humans, we need expression. no matter what anyone says, emotion is an important part of everybody's everyday lives. if you don't express what you feel, you just get clogged. so pull that plug out and see what's going on inside - most likely you'll find that it's not just feelings of hate or despair, but maybe even the excitement or joy you thought you lost!
and also, don't be afraid of it. everybody's too absorbed in their own lives to make fun of you for saying/doing what you feel. in fact, i've learned people even like you more when you're honest and upfront, than if you hold back and choke out your emotions all the time. absolute true story.