Lease signing

I AM OWNER OF HALF OF 27 ACRES OF MINERAL RIGHTS IN COOKE COUNTY TEXAS,THE OWNER OF THE OTHER HALF SIGNED A LEASE WITH GRAYSON PET, THEY ALSO SENT US AN OFFER, WHAT HAPPENS IF WE DONT SIGN, AND IS THERE A WAY TO SEE THE OTHER OWNERS LEASE?

THANK YOU

CHRIS