Hello glenjo,
I am sorry you have been hurt by all this. At least your friend is in treatment at the moment. And if he has had suicidal ideation, that really is the safest place for him at the moment.
It sounds like you have let him know that you will still support him and still want that connection with him, and he just has not replied. He may or may not choose to speak to you at this point--and as much as it hurts (and I know how much from personal experience), that is his right to choose.
I hope you have friends and family to whom you can talk and spend time with. Distract yourself inside your own life. Time is your friend.