<human>: Long story short, she cheated on me behind my back with I don't know how many guys, told me I, yes I, had to fight for HER trust when she was the one clearly betraying my trust. Then she broke us up, all my efforts were in vain, she chased after my ex-Bestfriend and refused to get away from my friends, I had to abandon all my 5 closest friends just to get away from her. Afterall this shit I've had for trusting a woman and giving her my whole heart, I just can't not wish holocaust was all about massacring the female gender, my dream has now become to break as many girl's hearts as i can in my lifetime, it's the only reason I ever flirt anymore, I'm bi and I guess I'll turn the other way around and go for guys after breaking some hearts back.

Can you summarize the given text in a few sentences?
<bot>: After getting hurt I became a sadistic monster against woman, and I think I'm going gay (I'm bi). How can I ever go back?