It's not "the only reason you're with her", yeah? Presumably if you'd gone out with her and found her a repulsive bore you would've worked up the nerve to probably ghost her, and you've since found many reasons why she's worth being with, right? Maybe stop phrasing it like "the only reason I'm with you is you're scary and I said yes" and instead try "the only reason I first started dating you is you're scary and I said yes, but I'm glad I did now because it gave me the chance to discover (insert all the ways you love her and she makes you happy now)". Phrasing, bud. It always comes down to phrasing.