OPINIONS PLEASE.

I'm a freshman, turning 15. My boyfriend is a senior who just turned 17. He and I have sex and we're dating. He's met my family and comes over almost everyday after basketball.  It's no secret that were dating, he shows me off to everybody and he told me recently that he loves me. I know that some people probably think he's using me even though I'm almost positive that he's not but I'd like feedback please.