Hi,
Thanks for the replies, everyone. Right now things have mellowed a bit which is good, but will make me complacent.
Iamforfreedom-
I'm actually more afraid than guilty. I'm afraid that if I force the sale of the property that he will really be desperate-- his business is there and he pays no rent. His business doesn't make much money so I don't think he can even afford to pay rent. I'm going to get a lawyer and see what my options are.