I Have Secret Sexual Urges

I know this might sound super weird but sex with myself is way better than any man I've ever had sex with even my current fiancè. My fiance really love sex and we do it every morning and night but even then I never miss out the opportunity to have sex with myself and climax much more. But of lately I've started feeling guilty almost as if I'm cheating on my fiancè with myself. It feels good to let out this nagging secret out of my conscious mind.