I think you have a right to be angry or sad. From what you've described, you're putting forth all the effort and she's taking it for granted. You should address these issues with her... or try your hand at some underhanded Machiavellian ****. If she's a good friend, she'll understand and make efforts to be more kind. If not, you shouldn't stay in a friendship with someone who takes you for granted... Just my humble opinion.