Boyfriend says he wants to be my hubby one day

Ok so atm I'm 17 and he's 18. I'm still in high school and he's I college . Ever since we were in 3rd grade he use to like me and now  he has me. I know it's to early to be thinking about marriage but he says these things. He doesn't expect me to say them back and I'm cool with that, but I think he could be the one. We've only been together 9 months and I'm in love with him. He tells me he loves me, and he tells me that he wants me to be his wife.  The problem is idk if I'm just scared to believe or I just shouldn't believe him.