What should I do?

So I have this friend. He loves the lord and he loves to dance a lot. So he dances on the street to share his talents with other people in the community. But he has some mental health problems. My mom gets mad at me when he calls me or if I'm friends with him she said it messes up her image, our image. He's a really great guy and a lot of people in the community love him. I haven't talked to him because of my mom. I am 21.