[ianpurton]

Have you considered using a mediator ?

There are people who come form a counselling background who are experienced in settling business disputes such as this. I would present it to your partner as business strategy consultation or something like that.

But basically, you both need to talk and come up with a solution that works for both of you.

[throwfrustrated]

This is a really good piece of advice, thank you. We actually have some common friends who are either web devs or entrepreneurs themselves, and I've always had this whole thing hidden from them. Might be a good time to bring it up and ask them to mediate.