Debbi did a great job assessing the primary issues, to answer your question about how much you would lose...
Depends on the market value, but very doubtful it will sell for much more than you bought it, you'd probably need to bring about 5% of the sale price to the closing table, depending on the various fees in your area. I assume you don't have that cash laying around (most people don't!).
You could try renting it out, then finding a place for yourself to rent. You'd probably have to wait a few years before the value increased enough for you to sell and break even. Housing is a long term investment, so it takes a while to make money in real estate.
Why did you buy the house? What did you like about it? Debbi is spot on to try to focus on those items and give it a little bit more time.