I bought a house, and now foreclosure is an option what to do??

I bought a house about 7 months ago with my then fiance. She let after only 1 month and the payment was based on both of our incomes. Now my savings have dwindled to nothing and I have been told I will be layed off in 2 months if I don't take their job offer in another city. I have had my house for sale for 4 months and no "bites" at all and now I am wondering what would happen if I stop paying and let the bank foreclose? What are my possible options -I cannot afford to keep the house and would like to get out(my company has offered me another job in another city -with a paycut).I have an FHA loan and my ex-fiance is also on the mortgage- what would I be liable for if I just stop paying?I have 2 months left here-should I live "rent free" for those 2 months and build my savings back up a little and let the bank figure out I am not going to pay ? Or should I inform the bank of my intentions?Also what effect on my credit rating will a foreclosure have?I have had excellent credit and have