My mom didn’t show up to my birthday party yesterday. Do I have every right to be hurt about this? [I Need Advice]

I texted my my mom last week to remind her that it’s my 18th birthday which was on the 15th. I mean I shouldn’t have to tell her because she’s the one that gave birth to me. And guess why she did not respond until The next day. She didn’t even say happy birthday to me at all and then I asked her if she was still going to come to my birthday party and she said that she might have to work. Frankly she always makes excuses. Like whenever I invite her to something she always has the excuse that she has to work or something came up.
So yesterday was my birthday party. I’ve been looking for my mom to see if she’s going to come. I mean she said she’ll try but she never showed up. So my dad and my half brother and sister and my aunt (that’s been a mother to me) had to sit me down and bluntly explain to me one more time that my mom is not interested in my life and I’m an 18-year-old woman now and I’m too old to be crying for my mommy. This is my mom‘s fault for abandoning us 10 years ago and she never calls or anything so why bother inviting her in the first place and plus she probably can’t handle all of us calling her out for leaving us. My sister said it was my day and don’t let that loser ruin it and just have fun and move on. My dad‘s girlfriend told me bluntly that I need to take care of my own goddamn self. I’m an 18-year-old woman now and I need to start making myself happy instead of chasing after the woman that doesn’t want me. Forget her!
😭😭😭