I'm back off.

"At some point you will realize that you have done too much for someone.
And the only next possible step to do is to stop.
Leave him alone. Walk away.
It's not like you're giving up and it's not like you shouldn't try.
It's just that you have to draw the line of determination from desperation.
What's truly yours would eventually be yours, and what's not, no matter how hard you try, will never be."