I am in a very complicated situation. I live in London and alhamdulillah I don't smoke or drink any haram drink, but one of my cousins who visits me once a year from Sharjah has a bad habit of drinking every day. He is staying in my house only for three days every year, using one of the rooms while he is drinking at night. He doesn't come out from the room but still I don't like it.
I am afraid that if I stop him from drinking in my house, he would just go out for drinking instead. Furthermore, it would break my relations with his entire family. Apart from the drinking, he is a good person.
Please tell me what should I do from an Islamic point of view.