Success...now what?

I realized that I'm ok as long as I keep myself busy. With everything coming to a slow stop, as the holiday season comes around and I get a break from everything, my mood gets horrible. It's like I don't have a purpose, like something is missing. I think "normal" people fill that void with religion. Speaking of which, the other day, someone criticized my competency dealing with middle school aged kids on the basis of me being an atheist. I asked them if they believed in Santa Clause and they told me no. I then asked how are they competent to teach elementary school? Not too happy with me now, but they weren't before either, so what? One of these days, when I run out of things to accomplish, I might need therapy. I should be happy, I should be proud, but I'm not. It feels like everyone is mad at me or they want nothing to do with me. If I have nothing to keep myself busy, I feel useless. I mean, I'm doing everything I'm supposed to, I'm getting an education, I work, I keep myself up, I'm losing weight because I'm fat, I know people respect me, I do a great job at my school, I get good grades. Every aspect of my life is getting better, so what's wrong with me? I even feel bad about writing this because the few people that might actually read this will just think I'm being stupid. I really don't need or want anyone's pity, I just want to feel better.