I'm in a relationship of 7 years, not married, no kids but cohabiting for 5 years which has some legal implications but nothing as debilitating as a marriage contract (Uk law)

My gf is cheating, I have proof, plenty; but we also have a business together of which I have a 30% stake and is worth approx £160,000 in assets accumulated over 3 years, with a little bit more investment needed to actual get the business into the black and operating smoothly with little input. We've got about 4 years left of a business plan sponsored by a government enterprise sponsorship scheme.

I also have a full time job and am studying part-time for a STEM degree, the job pays pretty poorly but I absolutely love the work/company and the prospects in the field are good once I have that degree.

I thought I had it made and all before I'm 30 but AWALT..

Right now, I'm living a double life, spending all my spare income on legal fees trying to either liquidate the business to regain my assets or force a sale/financing of the business to get the fuck out (the business has no debts). All the while I'm putting on a show of everything is fine, because I l know that the second SHE knows that I know, shit will hit the fan and the ball won't be firmly in my court.

In the meantime I'm just fucking depressed, it'll be months before things will be in place to get a court date, and weeks 'til the business is formally valued (fucking tricky without her knowing), Before she gets that letter I need a new place to live, and the funds to move out.

This isn't good for my health!.. at one point I was considering swallowing my pride and continuing the business for a few years and then cashing out for much more money but that's a big risk that could go to shit given the status of the relationship and in the meantime Im just a fucking cuck..

The current business agreement is pretty solid and makes the above possible but obviously written by OUR solicitor, my new lawyer is pretty damn good and reckons I'll come out smelling of roses but says itll take 4-6 months.

Has anyone else been in this situation? can you offer any advice? I'm the kind of guy that would just leave silently in the night, see you in court kinda thing.. rather than blow up in her face as that just plays to her hamster strengths, and risks me getting arrested.

tl;dr

Never start a business with someone you're fucking, even if they seem(ed) like a unicorn.