He puts no effort and ignores my efforts?

I have been with my boyfriend for going on 7 months. The first few WERE amazing and he has been loyal and pretty honest. We only live 7 minutes apart, but with college and work we wouldn't see each other every day, but we called every day. 3 months ago, his job started cutting his hours. I was hired a month after that at a salon, and I work 30+ hours a week in comparison to his 20. I work day shifts 10-6 or 9-5 and he works evenings 5-9:30. He used to make effort to see me with his busy work schedule, and even though I work now I still try to see him and call him when I know he is home, but half the time he doesn't pick up, and during my 3 days off he doesn't work until 5, but he won't even bother to spend even a few hours with me before he heads to work. The thing that gets me is, I'll cook for him, or offer to treat him to dinner, or plan something and he'll disappoint me. But I've gone to his shows (he and my brother play in a band) I've went to his little brother's baseball games, visited his grandma with him, and nearly every weekend his mother disrupts our plans by asking him to pick up her and her friends then drop them off at a club, 3 hours later go to pick them up from a diner, wait for them to finish eating and drive all 3 drunks home and by the time he and I get back from doing this the night is over and we spent 0 quality time together. We see each other maybe 3 times a week AT THE MOST, but he will drop our plans to drive his pothead dad around or his drunk mom to the club. I could understand if they paid for his college, his car insurance, his phone, medical...anything, but he supports himself and these people do little to nothing for him. I have fed him, bought him clothes he needed, drove him places, etc. He didn't even get me a card for my birthday or come to my party. He used to treat me to dinner or movies when he could, but I always drove us everywhere we went. I can't even get him to do something free with me. What is happening?