How could I

I hurted the person who I should have defended I have hurted him I am sick of myself only because he left me and I have behaved in the wrongest way possible when I was with him
I don0t want to see myself on the mirror again I want to broke the mirror I want to hurt myself I want to kill myself I am only a messed up thing,
I fucked up everything I want to puke I am puke, I am revoilting
I messed up a 2 years relashionship only because I wanted to have sex,
I can't see a girlfriend of a frind of mine because I think them 2 having sex I'm scared about what I am thinking
He left me 2 days ago I miss him already
I just hate it, I hate that I'm an piece of shit
why have I done? it why
I need he I am relly dissapointed in myself I don't think I will take everything
I want to be with him also at the end of the world
I don't know how to get over it
I just want to be with him again