What are these bumps..

Lena

I have a boyfriend who I been with for 6 years and he’s the only one who i ever had intercourse with. We never use condoms. I have notice I been having these bumps I don’t know what they are but they are right under my butt under my thigh.is it just bumps and mean nothing? I don’t want to go to the doctors bc I am kinda embarrassed. The bumps don’t bother me it’s just there. They don’t hurt or itch. Could it be just pimples? It’s been there for a while now.