AITK for hating my bestfriend right now?

We've been friends since the last 8+ years and very close. Last year, it was getting harder to meet and hangout because the both of us has too much on our plate and especially me because I had my brother's wedding and a ton of social functions to attend and college work. She would call me out and say that she misses me etc and then when I would actually make plans with her, she'd cancel on me last moment, not answer the calls or just make other plans with her family. Due to this I was cancelling my work and thinking that I'm in the wrong since I'm not meeting her. This has been going on till this day and I've even gotten mad at her a few times about this whole situation and she's apologized every time.

She called me on Sunday she wants to meet and make it up since the last meet was again cancelled by her which a dinner plan and she forgot to let me know that she is getting late so we'll postpone the plan and I, like an idiot waited till 9 pm for her and I was way too hungry till then. So as an apology she wanted to take me out and even cancelled that plan since she was busy with her interview, which is okay but my main concern is she can atleast let me know rather than keeling me ha ging like this. Then she called me up yesterday saying she wants to meet today after her office ends, @7pm and guess what I waited and she never called and right now I texted her that I'm mad and will never take her seriously after this.

I think I should start taking plans with her for granted like she does mine. I don't see it in me to break our contact since this isn't actually a betrayal or something too serious but it is annoying.

The thing is, when we meet, she'll tell me she had too much work, which she did right now. She sent me a snap of her work that she's still doing in the office and she'll tell me she was so so busy and hence forgot and will apologize way too much and will remind me that she's leaving India to make it emotional so that I forgive her because she's going to be for a short amount of time only.

I know behenchara etc and sis code and not bitching about your best friend but I'm way too annoyed with her behaviour now