kinda apprehensive..

So my boyfriend keeps wanting us to take our relationship to the left level. I dont know if I'm ready for the responsibility of sex yet considering the risk of pregnancy and all that junk. Him and I have discussed it on numerous occasions and we have also done some things but never had sex. I'm kinda apprehensive because I'm self conscious of my body and I don't know if I want him to see me naked. How can I be more comfortable in my own skin around him when we finally go to do stuff? Please help. 😬