Wanting to marry a man who will convert to islam

I am a 31yr old female and have never married. I know of a man who is not muslim and who is divorced. He is interested in marrying me and following Islam. I know if I approach my parents they will disown me as they only regard social status more than a child’s happiness. I am also the only daughter and have older brothers whom I am very scared to talk to. My mum verbally abuses me, telling me I will never get married and compares me to many other girls who are already married. She tells me that I have a jinn in me ever since I was little and has exposed me to many Aalims to perform ‘rituals’. But now I have an opportunity to be married just not according to their standards. I am very depressed and very torn. I do not want to displease them and want to do what’s right in the eyes of Allah. I have not received many proposals and the proposals that my aunts bring, they think I am desperate. I am pretty and well educated but my mum thinks the worse of me. Please help as I am very depressed. I know in my heart this man will look after me.