There must be a plus to why you still want him around. We dont know what it might be, could be you don't like admitting that you made a very bad choice.
He is a boy; not much of a friend. Being alone isn't awful. you don't need to be part of a couple. Change the locks if it is your place.... Or move. He will be fine, you don't need to take care of him. His kind always survives.