I really like the sizes of the bubbles. Might just be me though - but I think they really go well with how I picture a -holic would say those words. ...eh. I think I need to explain, maybe you'll understand
so I figure the first bubble is an aknowledgement; "ok, I'm here, I have to do it" - so it's kinda come out in a burst. So it's big.
The second one, is a bit smaller, ok - she realises it at this point (that she is actually at this meeting or whatever) and she doesn't know what to do about it, but then she says her name and it makes everything real in a way.
and the third bubble is small because of the name making everything real, so she tries to hide, but realises she can't anymore and the words escapes her
and then the last one; a mixture of pride of herself because she made it through the sentence and relief maybe.