I'm 70 years old, i own 51% of the stock

What do the shareholder agreement, operating agreement, bylaws, and/or certificate of incorporation provide?  If none of them speak to the issue, it would be governed by statute.  I am not familiar with the corporate laws of Texas (assuming that the business is incorporated in Texas; many businesses are incorporated in states other than where they operate), but most states require such drastic transactions to be approved of by a super-majority of shareholders, often 2/3.  If the shareholders are deadlocked, you should be able to petition the courts to dissolve the corporation.