let him talk to whoever he wants, text who he wants, do what he wants. you just keep respecting him and his space, if he decides to mess it all up, he'll have to live with losing the best person to walk into his life.
I'm sorry that there were days when smiling hurt but you forced yourself to laugh so that no one had to worry about you. I'm sorry that you gave all of your time and effort to people that didn't give the same amount back.
Dear me, I am sorry.
I'm sorry that you tried so desperately to fix others, when your own hands were shaking. I'm sorry that I didn't give you enough time to heal, that I let you seal the wounds of everyone else whilst your own were bleeding.