Should I be mad/disappointed? Friend bailed on my birthday?

I had a party last Saturday, and my friend didn't come because partying isn't her thing I guess and her boyfriend didn't want her to go (like usual.) I was cool about it, and she said she would spend my actual birthday with me. We had school today, apparently she slept at her boyfriend house last night, and she didn't come to school for whatever reason. She hasn't even texted me or anything to say happy birthday. Basically it's 4:30 and I Haven't heard from her and probably wont. what would you do?
Should I be mad/disappointed? Friend bailed on my birthday?
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