best friend ditched me for bf

I use this forum to rant wayyy too much but I have no one else to vent to so yeah
I was supposed to get a tattoo done tmrw and my best friend was planning on tagging along. we'd been planning this for a few days and were both excited. then today I suddenly got a call at midnight saying she couldn't come with me because she had to go on a date with her bf (who used to be my ex situationship btw). She told me to change the timings or shift the tattoo sesh to another day but I couldn't because they literally had to squeeze me into their schedule and I'd alr told my mom several lies that only worked for that specific time. I told her to go on the date and that it was fine, I could just go with someone else. It really sucks because I thought she valued our friendship more than some guy.
Sorry for the consistent rants, literally nothing in my life is going right and I just need to let it all out somewhere