It does not sound like you are in love with him. It sounds like you like him as a friend, you are very used to him and you dont want him out of your life.

Maybe you are scared to be alone? maybe you are unsure of yourself and maybe your mood and emotional states make you dependent on him.

Seems to me that if he feels unloved, and you are unsure - its maybe better to stay friends. This will be just towards him and would allow you to know yourself better.