catching feelings and idk what to do

im 17 and ive been talking to this guy. here’s a lil backstory, we used to talk 3 years ago but nothing serious happened and i kinda caught feelings back then. now, here i am, talking to this guy again knowing damn well i’m gonna catch feelings and i think i am which is crazy because i never do but now im overthinking because if nothing serious happens then this was all just a waste of my time. idk what to do :/