Hetero-Romantic? What does that mean?

I asked a question earlier about if me liking gay sex and or liking the the thought of it. Would be make me gay or bi. A user said that I might be only romantic with females and turned on by males. I wanna throw out a theory about homosexuality. Most gay men or gay women know they are gay from a young age. Like they want to be with this man or women. In my case, I never had a moment like that. I have always been sexually attracted to women, and I always wanted to be with one. Men have some sex appeal to me. They have been for a while. Im 18 and ages 17-18. I have seen a huge leap in sexual preference for men. I don't know what it is but I am blaming porn for damaging my mind. I plan on eliminating that from my life and want to get out their with women. I did porn because I thought why would a women want to be with a nerdy guy like me. So I need confidence in myself and I think I can get that arousal for women again. I can't get "hard" over women anymore and its been that case for months. But subconsciously I know I wanna marry a women. Now I wouldn't mind having sex with a guy, but thats as far as I go with men. So do I sound fairly Bi with a preference for women even though I am having trouble with women at the moment.