where did I go?

I’m chilean sorry if you don’t understand something)
It’s weird because in the morning I was very happy and I go out with a friend and blah blah but now like 30 minutes ago BOOM! I fell in “depresion” I mean I feel like a pity, like a fool again.. I don’t want cutting just I fell like I never do something right and I’ve been liying to everybody of who I am I want to be really happy… Not just for a while
And I have ,during a month, the feeling that the relation with my parents it’s made of plastic.. If I do something wrong will mean another months of troubles.
Oh yes here in my country is summer and I still like that. I won a academic merit prize and they still being distant..
I am a fool?