Unprotected sex?

So my boyfriend and I have been together almost 6 months and been having sex for almost 3 months and jut recently we have started having unprotected sex. I am on birth control. What I am askig is that if a guy really cares and loves you and has unprotected sex with you is he serious. I asking because I have people tell me im stupid for doing that becaise they think he's using me because of our age difference. Any opinions.