Out of Motivation

My son who is 10 and in 5th grade continues to do bad in school and be careless about his work. He has had consequences at home and at school. I spend night after night with him going over school work and studies and I feel my efforts are a waste of my time. I know this is sounding very selfish but I am tired of having to go through this everynight. Especially when I am not seeing any progress with him. I feel mentally exhausted dealing with his school issues and all the other issues with him. Keeping his room clean, brushing his teeth, daily hygiene, he doesn't care about the way he looks, he doesn't care about keeping himself smelling good. I just don't get it, there has to be some sort of larger issue. He told me he wants me to spend more time with him. I feel like when he acts this way I don't want to be around him. That doesn't even sound right, but that is the way I feel.