My brother told me he wants to marry someone, yet he is embarrassed to introduce her to our family?

It is possible that your brother is not ready to introduce his partner to your family yet. He may be unsure of their relationship or may not feel that it is serious enough to introduce to your family. It could also be possible that he is embarrassed or nervous about introducing her to your family because of the potential for rejection or judgement. It is important to remember that everyone’s timeline for introducing a significant other to their family is different, and your brother may not be ready yet.