I think its only fair that if she is invading your personal space all the time, that you still be able to enjoy some of the things you always do. If you have to put up with her neediness, she can put up with your having a glass of wine when you please or eating onions, etc. If she can't leave you with some alone time, you can at least lay down some boundaries. Friendship should go two ways, not just you accommodating her all the time.