No sex drive

I’m 19 and I literally never crave or want sex and avoid it. I feel like that is not normal. Does anyone else go like 8 months without sex and have no want for it at all? Also once I have sex with someone any feelings I had for them are gone like *boom* just gone like that. I don’t know. And I have been single for like 3 years and don’t like anyone or get crushes. It’s like I’m incapable of falling in love. My friends don’t understand how it’s literally impossible for me to catch feelings for anyone. And I REFUSE to get ate out because it doesn’t feel good and it’s way to intimate and personal. Idk.

*update* I’m on birth control but have always been since I was 9 because my horribly month long periods.