I am in Texas. I installed fence 2 yrs ago on our 1 acre lot. I asked both neighbors (I am in the middle)if they want to share the cost. Both declined. So I installed the fence 1 ft inside of my property line. 600 linear feet of total fence. Today one neighbor started to install a gate comming across his property butting up to the the fence I installed. He refuses to pay for half of the side he is attaching to. Now I can not access my fence. What should I do?