Ho could I know if he is the "one" ?

I am a 30 year old girl who recently broke up from a long relationship.. Now there is a man in my life who wants to marry me He is a good man with all the good qualities.. a doctor and loves to help people He loves me very much The problem is I am not attracted to him.. Despite that, I am afraid of being alone. I do not know if age is a justification for my marriage to him. I do not know if I will love him later.. i want to have a family i want to have a child.. and my ex broked my heart

Ho could I know if he is the "one" ?
Post Opinion