I don't think it is a good idea to get off the adderall just to stop supplying your friend since you are on it for your benefit. If it helps to get your friend to stop asking then just tell her you are off of it and don't bring it along when you will be around them or just bring only enough to cover what you will need. If you really want off the adderall then talk to your Pdoc to see if you would be ok without it or if you should switch to another medicine.