thinking about anything romantic makes me feel like i'm about to vomit. is that normal?

maybe that's a normal thing for teenagers to be experiencing, but it's so weird. most kids in my class want a boyfriend/girlfriend or have crushes. but when i even try to think about dating anyone, like, romantically, or even kissing, i get the urge to vomit. for real. i sometimes had to use the bathroom because i accidentally thought of something like that or saw a couple being affectionate and i had to throw up. i just feel super repulsed about romantic stuff.  is this normal? pls help me im so confused