What I Hate

I hate this feeling..
When I'm happy for a while and I don't have a care in the world or everything around me
But then..BAM!
I get in bed and I can't help but think about everything, I remember all the things [all the fucking stupid things] that are wrong and I just.....I just feel empty suddenly and everything I were feel before return and I'm being on my unhappy self mode.
Seriously, this feeling really sucks.