highly confused

So I dated the guy in the 9th grade and when we broke we still were kinda close to each other in a friendly way though, I'm  17 now and a senior and a few months ago we started "talking" to each other even though he has a girlfriend, I'm not the type of girl who breaks up anyone's relationship, but he's been sending me and asking for "those kinds of pictures" and even told me he wanted to have sex with me, and if he could "come over".My parent raised me in a respectable way so of course I never let him come over, but I still have extremely heavy feelings for him but I don't think he feels the same as I do about him. I can't really talk to anyone else about this and idk what to do. Please help