None of us here are professionals, but I'm thinking depression might be what is causing your symptoms. I also think you need to see a therapist to find out for sure and get treated. What you're dealing with does sound sad.
I'm sort of dealing with this issue, too, though, as I am thinking about the New Year and how I spend my time. I want to be productive. But, that said, I think we all need some down time where we do something we like. But as skeez says, we just need not to get carried away with that!
Again, welcome to MSF! I hope you'll end up enjoying some activities here, start meeting new friends, as well getting some help and suggestions.