Marrying a much younger man

Frances

I am 42, and in a relationship with a man aged 32. We share many interests, and have a lot in common as people, and have discussed marriage. But the age gap makes me very uneasy, as I am afraid that if I marry him, he might find someone younger in a few years. The possibilty of my getting pregnant is low, both because of my age and because I have had cancer. Although this doesn't put him off now, it could do in a few years, as I know he hopes for a family. He lives abroad, in Norway, and the prospest of going through a divorce in another country as well makes me feel really unhappy. I am strongly tempted to leave the relationship. What can I do? Can anyone help?