If she went on to tell you what she thought would help you with your work habits-then no, she didn't brush you off. You brought it up when she said something about your work habits so I guess she figured you wanted/were looking for advice about it since she probably knows that you know she had ADD too.
I don't think she criticized you, muze. She was just giving advice on a subject she's very familiar with and she obviously has great faith in your abilities since she seems to believe you can do the 8 classes. She has more belief in you then you do in yourself.
If you wanted her to lend a shoulder to cry on about ADD perhaps mentioning it only when she said something about your work habits wasn't such a good idea. Try again talking to her about it when the two of you aren't talking about work habits or classes.
That's what friends do, they help each other. If she needed to make money to buy something very important to her but you saw her blowing her money on stupid things, as a friend you'd say something to her because you care about her and want her to achieve buying the very important thing she REALLY wants to buy.
Don't be mad at your friend. She just cares about you.
Give her hugs and say "thanks for looking out for me".
(((((((Muse))))))))