Hubby won't even try to look nice! What should I do?

My hubby used to always look nice. He took care of himself and was so good looking. He used to have girls all around him. For the past six months, I am doing good to even get him to take a shower every day. YUCK! I love to look nice. I put on makeup every day just as I always have. Even when I clean I try to look nice for him because I don't want him to think that he is not special enough for me to put on makeup and stuff. He, on the other hand, won't ever clean up. I feel bad because we went to the store the other day. I had on jeans and a sweater. My hair was fixed and I wore makeup. He had on a pair of beat up old sweat pants (that were a bit too thin in the front) and a t shirt that was too small and too short. It had holes in it! I felt awful because I was almost embarrassed to be around him. He won't fix his hair or even shave anymore. Well, that is bad enough, but tonight his friend wanted him to go out for a while and he showered, shaved, put on one of his best outfits, put on cologne and his wool coat and black leather dress shoes and was out the door. Why can't he look nice around me? Ever?! He doesn't even dress nice to go to eat with me anymore. I really want to talk to him about it, but I don't want to hurt his feelings. He is going to a club tonight and dressed up, but all he wears when we go out are ugly running pants and t shirts. How can I address this? He always looked nice before. Any advice would be helpful.