I think I fell in love with my fwb

We started off about a year & a half ago as just talking and then like six months down I realized I actually liked him so then we started hooking up, which led to us non stop hooking up but I didn't mind at all since it was great sex, but it seemed like he was loosing feelings for me & I was growing more. So then whenever we talked was just to meet up to hook up and I would tell him things like "you know I really do like you" & he will tell me right back he does & after hooking up he will say something came up that he has to go or that he will text me to meet up later & never will. Once he saw I wouldn't text him he will be texting me that he really wants to try things and be serious with me and I will get my feelings up & not understand why he then would ignore me two days later, now almost four months have passed & we haven't talked and lately these couple of days I miss him so much, i know if I tell him I miss him he will just try to hook up with me again and I don't know what to do.