What Causes Lump On Vagina?

For the last 4 years I have had a lump (a little bit bigger than a marble) on the left side of my vaginal opening. I have done some research and I think it may be a bartholin cyst. I have never been sexually active. This is not causing me any pain. It’s just uncomfortable. Should I go see a gynecologist? I thought bartholin cysts get bigger if left untreated, and mine has always been the same size. I’ve read that they can drain on their own. But I’ve never seen/felt mine drain. I’m not sure if I should be worried or not. Or what to do.