encouraging v. overbearing

i have a friend who did WW a long time ago, and has actually made lifetime twice before, but has gained back the weight again. now she has other health problems (sleep apnea, diabetes, high bp, etc.), and isn't really doing anything about it. she's taken some classes on dealing with her diabetes, and the doctor just keeps telling her that most of her trouble would be solved if she lost some weight - just 10% of her current weight. she tried south beach for about a week, and then gave up. she ate the diet prescribed by the diabetes person for a week, and gave up. she tells me these things constantly, but i don't see any commitment on her part to change.

she's watched my journey thus far, and also comments that she needs to go back to WW. i've never pushed, just encouraged. offered for her to go with my mom and i, so she'd have a buddy to help her on her journey. told her about the program, and why i like it. she finally told me last week that she was going to go to a meeting this past weekend, and when i asked how it went yesterday, she said she didn't go. her excuse was that she forgot to print the meeting schedule, so she didn't know what time to go. and promptly followed it up with a "but I really do need to go."

this frustrates me, because i'm kind of tired of hearing her shoulda/coulda/wouldas. she could do this, if she really wanted to, but i know there's no commitment on her side, and i know from personal experience that you can't make someone be ready to change their life. they have to be ready themselves, or they don't stick to it. it's just the way it is.

how do i stay encouraging without getting overbearing, or worse, just getting fed up at her? i want to print the schedule for her, just so she won't have that excuse, but i won't. i don't really want to talk about my success with her, because it will just inspire another round of "i should..." i feel like i'm in this weird catch-22 - she won't do anything at all if i stop encouraging, but i'm afraid i'll get pushy with her if i have to listen to her do nothing for much longer....