Honestly, the biggest asset I can see from your message is your girlfriend. Spend the next few days working on an awesome proposal, instead of working for people you don't respect any more.
The startup? Almost irrelevant, in comparison. When you look back on this in ten years, you'll agree with me!
After you've proposed, sit down with your fiancée (an awesome proposal is one where she can't say no!) and ask her what she honestly thinks of the business. Women are far better judges of these things than men - particularly men who are building the thing in question. If she doesn't think it's compelling, simply tell the other guys you are getting married and need a steady job, so you're leaving. You've learned a lot (about finding good co-founders, as well as al the tech stuff) and are a more valuable person because of it, so take that as your payment.
If she thinks the business is a great idea, things get more complicated. My suggestion would be leave, find a better co-founder, and start over. Or you could try to negotiate with the other guys for some up front payment and changes to the way they do things.
The startup? Almost irrelevant, in comparison. When you look back on this in ten years, you'll agree with me!
After you've proposed, sit down with your fiancée (an awesome proposal is one where she can't say no!) and ask her what she honestly thinks of the business. Women are far better judges of these things than men - particularly men who are building the thing in question. If she doesn't think it's compelling, simply tell the other guys you are getting married and need a steady job, so you're leaving. You've learned a lot (about finding good co-founders, as well as al the tech stuff) and are a more valuable person because of it, so take that as your payment.
If she thinks the business is a great idea, things get more complicated. My suggestion would be leave, find a better co-founder, and start over. Or you could try to negotiate with the other guys for some up front payment and changes to the way they do things.