I Am Unsure About My Sexuality

I Know Im Not Gay Or Bi, But!!... its just that i have never ever had the confidence to talk to women, even though i have always liked them, and always wanted to be involved with one of them, but im now 30, and i still havent found the confidence to talk to women, and im still a loner, as i have been , as far back as i can remember!!! but recently its been getting to me, cos ive been having nightmares about being with guy's, and then i wake up, and im relieved that it was just a bad dream!! i mean no offence to any gay people out there, but it makes me sick, to think about having a relationship with a guy, and its something i would never do, but i just dont understand why i have these bad dreams, cos i know that all my feelings are towards women, but these bad dreams worry me!!!