will i be a messed up person if my boyfriend proposes to me and i say no?

i told him alot of times i don't want to get married ever... i don't believe in it, since all my family been in divorced i feel like why even get married when it'll end in divorce if things don't go right . but he still wants to marry me and it's annoying. i mean i love him so much but it doesn't mean to sign papers and show it off to everyone , you know?