What do I do?!

I'm 17 and i just recently became sexually active with my boyfriend of nine months. We are seniors next year and plan on moving in together after we graduate and go to the same college. My parents don't really understand and they're throwing a fit constantly for me and him wanting to be together. We know absolutely nothing about sex other than the basics like needing a condom if you don't want kids, and checking the wrapper and expiration dates, but is there anything else we should know?