Hi (((Deilla))) I think you are getting confused about boundaries. The boundaries are more for yourself so you can learn to break free from experiencing these often upsetting emotions you experience. Your mother is NOT capable of giving you what you need. When that happens it NEVER means you are not worthy of being appreciated. Instead it means the other person doesn't KNOW HOW to appreciate you. Your mother doesn't have that kind of depth to her. That's why she tends to make so many excuses every time you try to ask her to.
I know this is a challenge, moms are supposed to be more caring aren't they? Well, often they are not and it's mostly because they simply don't know how.