I have a friend going through depression, something that I have some experience with myself. He's financially secure and has plenty of friends, but for some reason he has a very low self-esteem. He's getting professional help, but there are still days where I worry about him. He knows that he can reach out to me, but other than being there is there anything else I could be doing? I'd love to help him build his confidence, but I'm not sure if there's anything I can do. Any advice would be great.