SEXUALITY PROBLEMS, WORRIED?

[Fred Koran]

im 20 and ive always thought i was straight (im a guy). ive always felt that chemical attraction towards girls, i get nervous around hot girls, ive never felt that way about guys, and all my crushes were always girls. i always picture myself with a girl when it comes to romance fantasies, i could never see myself WITH a guy. But its just that i go through these cycles where i only masturbate to gay porn and fantasies, and then i get myself so worried that i cant masturbate to straight fantasies (even though at the end of those fantasies i stick a girl in my fantasy having sex with me) ive had sex with one girl several times and i always loved it, i would get frustrated when she wouldnt want to. Ive gotten erect everytime ive even gotten close with a girl. I go through cycles where one week all that can arouse me is straight thoughts, and then next week i can only do gay thoughts. But when its on the gay week i can still think of girls, when its on the straight week i dont even understand what i liked about the gay thoughts, can somebody help me, im just worried that this might get in the way of me wanting to share love with a girl that i HOPE is out there for me, i cant share love with a guy and i know that i dont need to experiment to know that i cant, what if i cant get erect with a girl at some point, even though its never happened before, i guess i allow it to worry me because i havent had sex in almost a year so i start to think what if

but i dont need lectures on what gay really is, it doesnt bother me that these gay fantasies exist in me, but i just dont want it to interfere with my wanting for love with a future girl, it just feels like hell sometimes, i just dont ever want it to interfere which i dont see how it could, its never failed before but im a really paranoid person who jumps to the worst conclusion possible, help, i need to relax