im feel im gay, but i don't want it

hello, for first:
im sorry, im so bad english...im asian and learn english from google, but please help me and I am very grateful for that.im really crazy now, im so bad now. please help.

im 18 year old boy. I'm straight and i love women , girl. i want have sex with women and girl all time. but 2 day ago. i see one picture of police on website and my brain say "oh, he looking good"
it started the battle in my head. I started thinking about gay sex with guy. and im feel im like it. but IM NOT, IM NOT LIKE IT. I do not care about the boys in my life. but now. im look any guy on the street and my head say : "oh, guy so hot" but this guy so ugly. im watch gay porn and my cock not hard. im not like it. im crazy now.
i dont want to be gay
i dont want do it with men
i dont like gay porn, im watch it and im not turn
but my brain feel im like that.
OH , PLEASE HELP ME. IM CRAZY NOW. i want sex with girl, not men .