''I Am Having Séx With My Pastor'....please help

I really need your assistance. I recently started a relationship with my married pastor whom I have been close to for a while now. He has always been there for me through everything and he also inspire me. This is one of the reasons we bonded. Lately I have started developing some romantic feelings for him and I was very éxcited when he told me he felt the same way. I know this is wrong but we have begun a séxual relationship and the séx is the best I have ever had. I don't know how to stop and I have also started becoming jealous of his wife because he goes home to her every night after being with me. Please tell me what to do.