Is this weird! Or do I just love him SO much!

So my boyfriend and I are high school sweethearts and have been together for 5 years now (we’re 21) and for the past few months I’ve just been thinking so much about our future together, like children and marriage, I know we’re WAY to young right now but I just want to know is it normal to really want MORE with a person you love, even while being young? Lol he’s a GREAT guy btw, we’ve had a little bumps like any relationship but he’s perfect and I just can’t stand the thought of him not ever being in my life!! But I don’t want to scare him by constantly talking of babies and when we get married one day.....