do my work on time, and stop deliberately putting it off

ok so i’ve been finding that I just do anything to get out of doing college work. Not quite sure why because surely this should be what I enjoy. My Final major project is due in next week, i’ve had 8 weeks to do it and i’m behind, as ever. And I just can’t seem to focus on it. Everytime I try to sit down and do it, there’s a voice in my head going, “get some chocolate,” or “lets go on the intenet.” I know I have loads and loads to do and yet I just can’t motivate myself to do it. And I just don’t understand why. It’s the most important part of my course and my year, and getting into uni depends on it, but i just cant do it. What’s wrong with me?!