Bailing on someone who needs your support is wrong.
Robert is helping his friend Nathan through some difficult emotional times and is starting to feel burnt out.
Robert wants to have time to recharge.
Robert tells Nathan he needs some time to himself, so he can continue to be a supportive friends.
Robert blocks Nathan's number for a few days, so he doesn't have to deal with Nathan.
Nathan understands and gives Robert the time he needs so their relationship can continue.
Nathan gets extremely upset and ends their friendship.