Engagement cancelled by the guy.

Hi, Here I got engaged to a guy 4months before and it has been called off saying the following reason, He is a 35years old, free-spirit and not interested in marriage but his mother was seriously ill and emotionally blackmailed him to get married. So he randomly chose a girl that he liked and that was me and decided to give a try. but after 2months also, he realised he couldn't get into the committed family life and was feeling guilty but still did not reveal his feelings to me and decided to continue this relationship. And last month his mother was completely out of danger and was doing well and so he decided to call this off and he apologized and cancelled the marriage saying every fault is his and not mine. He tried but he couldn't get into a commitment and family life. (He has an elder sister 38years old who is also not married) Here I did not do any wrong but for him to try, my life is in stake. I have a younger sister as well. What can be done in this scenario. What should I do ? Kindly help.