Help, boy trouble

Hi, basically there’s this boy from my college and we talk and we have so much in common and we find each other attractive and stuff both, physically and sexually etc. We have normal convos and dirty convos but I want it to be more than just a ‘fling’ I properly want to get to know him. But I don’t know if he feels the same and I’m too scared to ask and I also don’t know what I would say if I ever asked,

it’s such a hard situation. Sometimes he seems so interested and then others he’s so blunt and distant it really confuses me and makes me feel shit. Help a girl out please