Am I depressed or no?

I've been going to a psychologist for a month or so but he told me he thinks I am ok and I am not depressed. And the truth is that every time I go I feel so good that I don't talk about how bad I feel the rest of the week. I always can't wait to go and talk to him and he really makes me feel a lot better, but for some reason the rest of the week is so bad. I wake up, eat, use the internet and go to sleep and I don't do anything else all day. I have no friends, no sex life, no hobbies/interests, no goals, my life is plain miserable, nothing makes me happy and I can't enjoy anything, and I don't want to do anything either. Actually I want, but I don't (can't explain that better.) I have no interest in anythinng: anything good sounds unrealistic, and anything indifferent or bad just makes me more sad.When I go out with some of my "friends" I don't have a good time, in fact we seldom do stuff I actually enjoy. They have other friends who are closer to them so most of the days I am all alone and I don't feel like talking to them about those stuff we are not that close. And I know they don't count on me that much, or care about me because I said we only hang out. I really need good friends that will care for me and be my best friends and I really need to live life because now I am just existing, I am not living... I need to get out of this misery that I am in for 3 years now...Am I depressed? What should I do with my psychologist? How to tell him?