I feel for her, but I don't have the strength to support her. I'd love to have someone to talk to, over coffee. Psychotherapy has helped a great deal. Changing my thought patterns and reactions. Acting like I have good self-esteem has helped, too.
Friends are great for self-esteem.
Be a friend. That's the key, really. Open up to your friends, and support them in return. Learning new things is good for self-esteem. Or running a little farther than you did the day before.