Stop feeling guilty! Three weeks is fantastic, wow, good work! Just start again and have fun with it all building up, it can be a different journey each time.
Honestly once you’ve hit the several weeks mark you’re wringing all the best stuff out of denial already. Sure there’s fascinating mental explorations to be had by pushing yourself to go longer, but this is mostly supposed to be fun and hot and so don’t be beating yourself up about ‘ruining progress’. Just start again and enjoy, and if you want to, think about how you could involve this guy, or another, into the process if you want to be going longer.