Help😒

I've sent a few pictures (as in nudes) in the past to like 3 lads in my school but everyone founded out and now it seems that every lad who talks to me expects a nude, and it's kinda upsetting cause I'm catchin feelings for this lad and I'm scared he's just using me. I haven't sent him anything yet but I'm scared if he asks me and I say no he's just gunna go away. What should I do😩 feel like I'm just been used for nudes