Hi, I've been kind of worried. Ever since I've become sexually active my vagina has been itching around the opening and when I look I can't see in it because there are bumps of skin in the way. I have only been with one boy and he has no sexually transmitted diseases or infections so what could this be?

He could have a STD and it just does not show at the time, many STD, some very serioius come and go as for as signs, others may show up and go away in outward sings.
You are acting grown up by having sex, so time to follow though with seeing your doctor.. Something sexually active women have to do on a regular basis anyway, and time to discuss birth controls

Still get checked because you never know what he can be doing that's your best bet ps.. I HOPE YOU GET BETTER