I'm feeling the urge to date this guy because I feel bad for him. He's always getting hurt in relationships and I don't want him to get hurt again.
Is that the only reason you want to date him?
No, I like him and I want to be able to care for him.
I hope he realizes that you feel this way one day because it seems like you wouldn't hurt him. It's really nice that you care about him that much even though you aren't together and I hope you also care enough about others to at least want better for them.
I think I may end up saying something to him soon.
Saying something sooner than later will be best. It's good you care for him and also want to be with him, hopefully the feeling is mutual.