Do you under stand this guy??lads help if you can? Xx?

Hey,!.i met a guy we was together cince i was 15 im 18 now, we was together for a year then after that we had sex it was my first but i wasnt his , hes had a LOT of girls!! every lad says no shes his girl you cant have her ,like im tagged as his girl !, its been almost 3 years and all weve done is have sex cince but this year i put a stop to it! The last time was halloween night i told him i dont want to have sex if it doesnt mean any thing? he just said sure what diff does it make,i told him to for get about it he knows i love him and im not waiting around for someone im never going to have,honestly i only had sex with him because i realy love him and want him 2 be happy i dont do it for my self i cant even feal him ha !! He says im the best but i think im to good? he had me under his phone as bitta sex,he tells his mates about me and says to have sex with me and says make sure you try her on top!! I et the head of him he also has been saying every day we meet that he loves me and always thinks about me and misses me and if i realy do feal the same we can do some thing about it he said if i tell him not to get with other girls then he wont, but i dont want to tell him i want him to stop because he wants to ,but what i dont get is why love some1 and not do any thing about it ?,i think he realy does have fealings but he has so many girls its hard to get rid of them all,he texts me but i dont text him back i just know why hes texting,also i think im starting to like some1 eles now but hes not the same as this lad hes not the charmer ive loved for years =( xx