Am I expected too much from a roommate

I female 23 and my roommate female 30 have lived together for a year and a half and we were friends/coworkers before living together but ever since we moved in together I feel like she only really cares about herself and I’m just here to help with bills and I don’t really know how to/nor do I want to bring this up to her so that’s why I came here.

For example she has come home with takeout and never asked if I wanted anything. We typically cook together and if I’m ever out on my own or with my family to get something to eat, I will always either ask/bring something home for her. There have also been several occasions where she has gone back on her word like canceling plans we had for last-minute things with other people, and saying she would help me out with cat sitting and then saying she wouldn’t when I asked her.

She is the only roommate I have ever had and it’s not like we don’t get along there have just been a handful of occasions that have upset me, and I just would like to know if I’m expecting to much from her or if I’m valid for being upset.