What would you think if your bf told you this.......mine did. I don't know how to react.?

I'd rather get a vasectomy...(come one he's only 20 yrs old!!!!) than risk getting you pregnant!!....c we have been together for 5 yrs...since we weree little kids...anyway. We are both in college and "love" each other and I was telling him that I wanted to make love but he "i don't have any protection!" I said it doens't matter it's not the time of the month that I can get pregnant. and then he said about the vasectomy....