I am an 18 year boy. Is it weird for me if I don't have inclinations to talk to or approach and woo women? Is it weird if I am never attracted to a woman? Is it weird if I don't have a girlfriend and don't like the idea of having intercourse and am planning to remain a bachelor?
No, it is not weird. Marriage isn't for everyone. "But I say to the unmarried and to the widows: It is good for them if they remain even as I am" (I Corinthians 7:8). Paul chose not to marry because his life as an apostle was not conducive raising a family. He preferred to focus on teaching the Gospel and because of the upcoming persecution the church recommended that others also forgo or delay marriage. Thus, marriage, and the sex that comes with it, is not a requirement on anyone.
It might be that you will change your mind in the future. That would be fine and if you don't ever change you mind, that is perfectly fine as well. Your view isn't common, but it certainly isn't wrong or an indication that you have a problem.
Thank you, sir.