Just want to be HAPPY!

I just wanna be happy. I want to go to bed without crying. I want to think about my mom without tearing up, and going to my room to cry. I wanna feel not depressed and angry all the time.
What is even worse, that my dad started seeing another women. I mean I wanna feel happy for him, but all i feel is anger!
I just want to go back to normal, and its getting really hard to do so!!!!