Having read your following post, I think you will benefit from setting some boundaries.
It's fine for your DD to say she can't cope with going out today (or whenever); however, she has to learn to accept that other people have lives/commitments and people (you, family, friends etc) are not there for her sole purpose. Being so demanding, that she's accommodated no matter what, is not going to stand her in good stead for the real world.
I can totally relate to how your DD is. I am like that too; however, I am a much older woman who has not had a life of being pandered to, or even people being kind to me. I had an abusive childhood and beyond, left 'home' (kicked out) at 15 and learnt strong coping strategies very early on that have helped me to accept that it's never going to be 'all about me'. Being in a long-term relationship/marriage (35 years) with a neuro-typical husband, I have had to make compromises and although it does not come naturally for me to show affection, appear interested, make compromises etc, in order to make my relationship work, I have had to put in a lot of work, apply critical thinking and communicate with DH. This will always be work in progress.
I think that your daughter's age has a lot to do with her current behaviour, her lack of self-awareness and her demands of you. Boundary setting and encouraging her to be mindful of her behaviour would be a good starting point. After all, she wouldn't be texting and calling her boss or her friends in the way she does you, demanding XYZ, so she has to accept that you have limitations too.