Love or not to love

So im in a weird situation and im so confused. After me and my ex of almost 4 years broke up i started to talk to another guy from work who went through a hard breakup as well. We started to mess around and are considered friends who fuck pretty frequently now ha. But its more then that we hang out a lot and i come over and spend a lot of nights with him now and i know we are just technically friends who have some fun but i am falling for him and he loves it when i rub his back and hair. Idk what to do, we have been doing this about 2-3 months now and i have asked him before if i was even datable and he said dont think like that cause i was feeling kinda down and he said he just wasnt sure. Hes last gf cheated on him and broke him heart bad so i know hes werry but idk what to do. I feel like i could lose him to but i know hes not doing anybody else either wnd hes gone for work now during week but he always invites me to come over on the weekends and its so nice to be around him.