It's good that you are medical student. But I think you two might face problems being more serious (such as getting married) because families with money usually would want another affluent family to join. It is more of a transactional relationship for them. But who knows, maybe his family is very open minded or she doesn't care what her family says. It wouldn't hurt to talk to her and be friends, right?
A strong woman takes advantage of help she can get from people around her but she doesn't rely on them for anything
She uses logic and manages her emotions
She offers help either because it is a business transaction or out of kindness. It is never because she hopes others will return the favour or out of fear of losing them
She has her own mind and thinks for herself and knows that she has to be the one who bears the consequences of her decisions