Nope, not at all. As long as you like it that way. I litterelly haven't seen another kid my age in months because I'm homeschooled and I don't bother to go out. Solitude is really nice for me because I can focus on school, art, writing, and my dreams all at the same time. If being alone at school bothers you, then make a bold move towards the other students and make them want to be your friend, but be yourself as always.