How can I ask my mom to see a therapist?

I have pretty bad self esteem issues, an eating disorder, and what seems to be on and off depression. I have a pretty close relationship with my mom, but I never really tell her my feelings. I don't have a very sentimental family so I tend to keep my feelings to myself. She has no idea about my eating disorder or depression because I'm also pretty good at hiding it. Any advice? thank you in advance.