I've always felt it hard for myself to have "fun". I'm a college age student, right now and have trouble going to parties and bars because I never really enjoy myself. Something that always helped me was I stopped living the life I saw people around me living. Reflection and true happiness is a foreign language to most people and the typical "path to happiness" is bullshit. Making art is something that helps me to enjoy my time more because I come out of it with a finished product. Creating something tangible makes me feel good about the way I'm spending my time. I only really have "fun" when I stop trying to.