I'll throw in that I am not sure in this case it was just a problem of polyamory. You wanted free time, you wanted private time,and you wanted time to do things other than hang out all day with somebody you are dating as it wasn't meeting your desires for life and felt like you were wasting time.
You had problems articulating that to her and laying out your boundaries, so in the future you might want to recognize stress that comes up from situations like that in the future, and speaking up as soon as you feel smothered or whatever it was you were feeling when you perceived that no matter ho much time you spend with her she "was not satiated"
That is a separate issue from polyamory, but I did want to mention it was separate.
Happiness will never come to those who fail to appreciate what they already have.