How do I deal with my mother not loving me?

Since I was a child my mother has always given other children more attention than me. I did well in school and she ignored me. I tried hard in sports not doing that well yet she didn't even focus on signing me up. She has forgotten dental appointments for me, yelled at me for basic mistakes and even hit me. I'm 16 so the effects of her doing it are minimal and my father does defend me a lot. I have worked hard on a lot of things from getting the highest GPA in my school to learned how to program computers and I don't spend much money either yet I just read books. Truthfully I believe she doesn't love me like my siblings for she is a bit of a bigot. Most people tend to think I am gay and I've never had a girlfriend. I don't believe I'm gay I just act fairly gay. Also I don't have many friends and those friends I do have are all a little strange for her. She's openly called me such terms such as a fudge packer and loser. Advice?