Is Getting Married In Secret A Sin? [Spirituality & Religion]

My Boyfriend And I Believe That We Are Ready To Get Married Now. Our Parents Think We Should Wait Until We Are Both Out Of College. I Was Willing To Wait Until I Got Out Of College But My Boyfriend Hasn't Even Decided Where He Will Go After Community College Or What Degree He Is Going To Go For. I Don't Want To Wait That Long. I Didn't Think That I'd Ever Get "Hitched" But I'm Okay With Being Married In That Way As Long As I Get My Actual Wedding Later On.