I'm in the worst relationship ever.
Why do you feel like your relationship is bad?
I do everything for him without getting anything in return.
Well, a relationship should be an even 50-50 split in terms of effort from both people. If he isn't pulling his weight, then tell him. If he still isn't after you told him, then consider breaking things off.
I've tried to tell him what I think. He listens for 7 seconds and doesn't give a shit.
It sounds like you've done your best to make this relationship work. Sometimes, it's just best to break up and move on, and I think you're in one of those situations.