I really want to get married

To my boyfriend obviously. Everyone's saying we're too young (I'm 19 almost 20 and he's 18) but he's my best friend and I'm so in love with him. He's everything to me. Nobody else could even compare. I want to wake up next to him for the rest of my life and I know that I could never feel this way about anyone else. I just love him so much and he says he feels the same way and I want to start our lives together already but our parents think we're too young and don't want us rushing into things. Everyone says we're too young to make commitments now but I know he's the only one I want to be committed to forever. It makes me sad that people are just disregarding our feelings for each other as young puppy love and not as something serious