Jax Taylor is not in a good place amid his split from wife Brittany Cartwright. RadarOnline.com can reveal Taylor, 45, has checked into rehab and is seeking “in-patient treatment” for his “mental health struggles” after separating from Cartwright, 35, earlier this year. A rep for the Vanderpump Rulesalum shared: “Jax has always been candid about his mental health struggles, especially during the past few months on his podcast. “He has made the decision to seek in-patient treatment. This is a particularly sensitive time for him and his family. They ask for privacy and respect until he is ready …