There's some really great advice here
Another thing which needs to be considered is a personal aspect of your marriage.
Look back over your marriage...Did you pursue, always wishing he would show more affection? Or was he the one more affectionate, and you the one more distant? Was there an addiction to porn, or other problems which would have taken his intimacy away?
(no need to answer here, but do answer it in your heart)
I ask this because it can make all the difference in how you respond to things now. First and foremost, as I said in another thread, take measures now to protect yourself. If your marriage time was spent with you trying to always get him to be more affectionate, open, etc., then now would be the time to distance yourself.
Again, this is a part of your marriage which you will have to answer to yourself.
His calling makes it sound as if he doesn't know what he wants. And, as others here have said, if he's hurting he's going to unintentionally hurt you further, if you're not careful.