Since I live too far away to help, get a cat.

Sigh. This has always been my job, having the strongest stomach in the family. Half a mouse left by the cat? Jeff will sort it. Bird wedged in the grill of the car? Jeff again. Rotting cat food, weird bugs in the pool, spiders (and this was in Australia, so serious spiders) - as a child I dealt with them all.
This has continued into adulthood. I've broken the necks of chewed up Indian Mynahs, removed grass snakes, caught and released innumerable spiders - frankly, when nappy time came around, I was already thoroughly broken in.

If that's the worst part of it, you're very lucky. At least mice don't leave the toilet seat up, even when they're alive.

I've often times wondered if I were to die, who would remove the trash from the house?
in any partnership one partner starts doing something and it becomes our job, it's easy to forget about how important that job can be as you rebuild your life you will find that there are many little things you'll rembor about your ex partner.
I humbly recommend that you concentrate on the good things and make do with the bad.

Yup all alone

You murdered a poor innocent mouse!!!!