Is it normal to fantasize only about samesex scenerios?

I abslutely love girls as i consider myself a straight male. When i spank it, i cum to a lesbian scene. rarely a blowjob from girls or me fking them gets me off.I sometimes feel uncomfortabe alone with a girl like im intimadated by her. I have had sex with 3 girls and had an erection but couldnt cum. I feel like im more into the lesbian porn than real women. Is there anyway i can combine my love for lesbians and have arelationship with a women? are there any chicks who want to be with a man who loves watching women be sensual together?