Confused

Catlin
Okay so i met this guy ab two years ago and we talked alot and even started dating, we "hooked up" a couple times and then we stopped talking. well everytime he gets a girlfriend he comes to me for sex, and always says were gonna get married. but im also like 4 years younger than him. and we always seem to go back to each other but im not sure if its bc we have good sex or if he "loves" me.