this is gonna sound stupid

Ok I'm probably going to sound really dumb to some of you but idc lol. I have been dating my boyfriend for 4 months. I'm IN LOVE with him like so in love. I've never been in love before. I've loved guys I've dated but not been IN love until now. I KNOW he's the one for me & I know I wanna marry him. I'm the first girl he's ever loved/had sex with. Do you think I'm dumb for thinking we're gonna be together forever?