Marital Decision

I have a question for you that I have struggled with for the last 2 years rather intensely. I am married to a man that I have “fallen out of love with” in part because of difficulties with compatibility earlier in our marriage, over the years I met and fell in love with a Dr. I worked with. I felt a spiritual connection with him that I had never felt with another human being. His wife left him last year, and I have said all along that I would leave my husband. Strangely enough, I have not been able to do that. My husband was 36 years old when we married, never before having had a serious relationship. We will have been married 13 years in September. This is my second marriage, and I am afraid if I leave my current situation, that history will repeat itself with this Dr. He has never said that he loves me , but my intuition tells me that he does. He does not want to be responsible for breaking up a marriage, nor does he ever want to be married again. I feel that I would be happier in the long run leaving my husband, whether or not the relationship happens with this Dr. or not. However, my husband loves me so much , even though I have confessed my feelings for another man, I still love and care about his. I don’t know what to do. I have prayed for happiness for all of us. I am “content enough”, although I feel like I’m “settling” and taking the easy path by staying in my cozy, comfortable setting. I want to “live, love, and taste life. I know I will live to be 110. I’m 50 years old, and healthy, active, and am excited to get on with the next chapter in my life, but I feel stuck. What do I do? I have read 2 of you books, The Spontaneous Fulfillment of Desire, and How to Know God. I enjoyed both books immensely. I look forward to your reply. Have a Great day!