boy help?

could really use some help here. i had a crush on this guy for a long time, and i only got over it when i knew he was happy with his other girlfriend. however, they broke up. and a few weeks later, we kissed. we’re great friends anyway and said we’d keep it as a friends thing. friends with benefits.

but he’s fallen for me, and i think i’ve fallen for him. there’s so much in our friendship- he struggles with mental health issues so it’s a full time thing looking after him. i know relationships don’t last forever, and he can’t commit, but he says it’s different this time. apparently he feels something different towards me other than the fact he wants to commit. something more. but man, idk. i don’t want to hurt him and lose him because i love him, but it absolutely hurts like mad when he talks to other girls. advice anyone?