Eviction because of a Friend

[Awesome Ed]

Does my landlord have a right to evict me because of who I'm friends with? My landlord's(or representives of the landlord) came a few days earlier and told me either I threw my friend out(which I have no intention of doing) or they were going to evict me. According to what I understand about eviction laws, you can only be evicted for non-payment of rent or breach of the lease. I have signed no lease, in fact I have never even been told when my rent is due, or how much it is. My landlords have been to my home on more than one occasion and are fully aware I have been residing in said dwelling for over two weeks. A few days before the incident I had asked my landlord to change a dryer outlet for me, the day they came to inform me of my friend, he offered to change the outlet(which I bought). They claim my friend was reported for criminal tresspassing, which is upsurd, since criminal trespassing requires you to forciably enter someones home without consent, weither it be written or oral, the only thing my friend as done is asked to borrow our neighbors phones, since he don't possess one. What are my legal rights, and help would be appreciated. I do plan to fight this all the way