Sasha almost wondering what people would say about me after marriage lol.
You wear the belt for a specific reason that is not related to any specific views on the morality of masturbation. Unless your future spouse is planning to continue your remedial education (and I feel like you should only marry after you believe you can handle independence), the belt, if it were used, would fulfill a different purpose than it does now.
I always feel as if it is a waste for someone who already has the experience and training for long-term wear to turn their back on chastity completely, but you and your spouse would have to define any new use - and you should probably also spend some unbelted time between being belted for disciplinary/educational reasons and being belted for... ahem... marital reasons, just to put a clear dividing line between those uses.