Hi WiseMind
This hurts, no doubt about it
What I had to do in order to deal with my mom's way out behaviors, was to accept that she's mentally ill. Doesn't make it any easier when what we want is a natural, balanced, mature mother-daughter relationship, but it helps take the sting out of it. Our mothers are not emotionally mature; they're like children at their core, and mean one's at that sometimes!
Stepping way back and just kinda observing her acting out behaviors, not taking them personally (it took a while and sometimes I still get rattled, but for not nearly as long - more like
ew, shake it off) while still going forward with my life and plans, miraculously helped me to develop real compassion for her... .
Your mother is obviously very troubled or why wouldn't she want to be a part of something so wonderful - her daughter getting her Master's degree! Wow! Congratulations!
It's hard (emotionally) detaching from our mother's of all people. You've invited her, she'll come or she won't; that's on her. No reason to beg, feel bad or guilty or anything of the sort.
Enjoy your party surrounded by people that know how to show they really care! You've accomplished a lot; something to feel very good about
