Hi There, I'm 15 And Thinking Of Engaging In Sexual

Hi there, I'm 15 and thinking of engaging in sexual activity.

Since I was 10, I've had these small pimples on the inside of my foreskin and they never have seemed to disappear. I clean well and dry well, I was given cream from a doctor but it didn't make any difference.

I'm nervous what my girlfriend may think, please give me some suggestions.