Painless lump near anus

I have a painless, soft lump near my anus and it's been there for almost a good year. It's not colored and I don't know what it is considering the fact that I'm only a sophmore in high school. I really don't want to go to the doctor to find out and I don't think I have a hemerroid because there's no sign of bleeding or pain. At first I got anxious if it was cancer (sure hope it's not), but who am I to know since I'm not even a doctor.