He fancies you. This is male rabbit courtship behaviour. It’s the rabbit equivalent of giving you a box of chocolates. Get him neutered NOW.

HOW DO I CLEAN UP RABBIT PEE?

A solution of biological washing powder/liquid is best or use diluted white vinegar. Never use scented cleaning products. To us they smell clean. To a rabbit they smell like pee and the rabbit will just mark over them. Disinfectants that turn cloudy when diluted are poisonous to animals. Buy a petsafe disinfectant not a human one.