help!! what should i do?!

okay so i’m 15 (freshman) and there’s this guy i really like (he just turned 17 and he’s a junior), i’ve known him since the beginning of the school year and we had a class together for half of the school year and he left the class after first semester and i have a streak with him on snap and i’ll sent cute photos here and then, and he hit me up during spring break asking to hangout so i hung out with him over spring break and i thought he just wanted to talk and drive me around but we ended up stopping at the park, we made out for a bit and he took me to the back seat and he fingered me and i gave him a bj, then he took me home and over the next two weeks he had only texted me like 3 times but it was little talk then we hung out last weekend and the same thing happened but i choked when he came bc he pushed my head down (is that bad?!?!) ,anyways i can’t tell if he is using me but like when we hangout we talk before and i feel like we clicked but i have a huge feeling he’s using me :/