How do I ask?!

Amanda
I've been seeing a guy for a while now. I've been on birth control for a while but that was mainly because I couldn't handle my cramps... we do have sex, but we always use a condom! I've been thinking a lot about asking him if we could maybe try to have sex without a condom. How do I ask without it sounding crazy... I'm not ready for it, but when the time does come.