<human>: My best friend and I, we'll just call her "Alex", have been friends since second grade. We now go to the same college and are roommates. I have always considered Alex my best friend, but I don't think I have truly ever been considered Alex's best friend in her eyes. 

I always go out of my way to get her a generous birthday gift, last year I spent $180 on her gift, and the year before that about $60. The last time I ever even received a birthday gift from her was five years ago, and it was a pink Snuggie. I hate pink. 

This year I wasn't even surprised when I didn't get a gift for my birthday from her, but she didn't even hang out with me the day of. Instead, she said she was tired and just went to bed early when we had made plans to hang out that night. Her 20th birthday is coming up next week, and she invited me to the celebration she has planned. Despite the fact that it will be an outdoor party and we live in Texas, I just don't want to go because she doesn't reciprocate the efforts I make. HELP!! I need a good excuse not to go, without overtly telling her my actual problem with the situation. I don't want to get in a fight, I don't have many friends as is and I still have to live with her for the next three months.

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<bot>: My best friend treats me like a doormat and I need to weasle my way out of this situation!