I left my ex (granted we weren't married but lived together longer than you were living with your husband), I left him at 48, he frankly wasn't nearly as bad and was a loving person and hard working but he had drinking problem, that's why I wouldn't marry and that's why it got too much for me, I was losing my mind. Daily drinking just doesn't fit into my life style. It was hard to leave him but I did.

At 49 I met my future husband and we got married at 50. We are having a blast, never been more content with my life. You aren't even 45! Why waste your time. Of course it is your choice but if you worry about age, there is nothing to worry about.