I owe more than my house is worth
Can I still sell?
Yes, but either the lender must approve a short sale or you must cover the shortfall at closing.
Are there other options?
Possibly a loan modification, waiting for values to rise, or a deed in lieu. Each one has credit and tax effects worth reviewing with a professional.
Educational information only. Not legal advice, and no outcome is promised. Laws change, so consult a licensed Texas attorney or HUD-approved housing counselor.