My ex-girlfriend is sick..really sick.How do i help her?

ok..my ex-girlfriend is sick..she makes herself throw up after she eats. And honestly..it scares the livin hell out of me. I dont know what to do.i mean i know shes my ex and all but i still care about her with everthing i am..i love that girl with ALL my heart.im a girl to so this may seem a little weird to yawl but it love.And shes tryin to stop but she cant..what should i do??PLEASE HELP!!