Hi,
This could get very messy, very, very quickly!
You should NEVER enter into any partnership agreement without an ironclad agreement in place, this agreement should be drawn up by a commercial solicitor in order to protect all parties involved. These agreements are not be found for gratis on the internet!
Your present situation is not good, I have no idea how your business is set up, so forgive me if I assume the worst.
If you have a joint business account, have registerd with HM Customs & Revenue, have insurance, own equipment etc.etc.
I would advise you to contact a solicitor right away, they will advise you on your options, you may not like the cost, or indeed the advice given, but they will explain exactly where you stand and your possible liabilities, which reading between the lines, could be substantial. This could also include any tax liabilities incurred so far!
I implore you to take legal advice as soon as possible, do not be mistaken that you can just walk away and start again, or that you can offer to just buy your so called partner out, no matter how tempting the options may appear, if you have registered with HM Revenue & Customs, the Bank etc, you are connected to your partner until this situation is legally dissolved, you may not hear anything for a few years, but sooner or later, this will come back and bite you on your A***!. Better to sort it once and for all now.
Regards,
Rob