shopping- it sounds like your friend is going through a very hard time. try not to be insulted. people dont just wake up one morning and say they dont need friends unless some major trauma happened. i know this from personal experience. please, let her know youre there for her. if you have texting capabilities it would be a great idea to text her something like,”i hope everything is ok, im here if you need to talk.” but you should only do that if you want your relationship to continue.
if you are ready to give up your relationship with her, then just forget about her.