Love life help please.

Ok my s.o. and I broke up after 6 months in June due to him messing around. We started talk and becoming I guess friends with benefits a couple of weeks later. He says he still loves me and wants to take us slow but he has been really standoffish with me example: at times when I try to kiss him his lips barely move, when I go to touch him he moves some and it seems kinda like a chore when he spends time with me. He use to be great we had the most fun and he was really affectionate and nice. Should I just let him go? I’m having such a hard time with this cause I really love him he is my first love. And to make things worse he does not like to talk about any of this so I feel pretty alone in this.