I was hoping for better, but I have a similar situation at home. You are doing the right thing by staying in touch, visiting when you can, and letting him feel your love. Beyond that, it is up to him to accept you or not. You should not have any regrets because you have done all that you can do to keep the lines of communication open. Hopefully, he will still come around. Until then, I know the pain.
Big Hugs!
Lori