I want my 31 yr old son and 26 yr old nephew to go.Both on drugs.The Denton County Court told me I have to establish a renter/tenant relationship before I can evict them. I have never asked for rent. I have called the local police. The police dept also said I have to evict them. Confussed.

I think you misunderstood. I don't think they were saying you have to establish such a relationship but that one exists. Go to your local housing court and find out the process for eviction. Since there was no rental agreement they are month to month residents. You will have to give them a 30 day notice to vacate. If they don't vacate by then, you then file for an eviction order.

Do you have proof they are doing drugs? Then have them arrested and ask for a restraining order.