can she sell the house and give me nothing if the house is in both our names? what should i do?
Contracts / Agreements Lawyer
If you are on the deed, she cannot sell your share of the house without your participation. It may be possible for her to sell her share only (although it would be difficult at best to find an interested buyer) or she may seeks the court's asistance to sell the proprety in lieu of partition.
This should not be construed as formal legal advice or the offer of the formation of an attorney/client relationship. There is no substitute for taking the time to consult directly with an attorney regarding your specific legal needs and issues.