Opinions would be appreciated. Possible trigger

I had a miscarriage Feb 23rd. I was 11 weeks pregnant and my boyfriend and i were very excited. My "best friend" at the time found out she was pregnant and we were due within 2 weeks of each other we worked together so we shared daily routines. Following my natural miscarriage while I was healing that resulted in having to have a D&C; done, she began to make comments almost daily about how I should be making her job easier since I was no longer pregnant and she still is. We had a rather large falling out and didn't speak for weeks when i tried to tell her how insensitive and hurtful her remarks were. I received an invite to her baby shower and it brings all my sadness back to the front of my mind since if things hadn't done the way they did I'd be having a baby shower this month too. I worry that I may seem petty for not attending since not everyone knows about our falling out. Those that do know agreed that she was cruel. My question is would you attend the baby shower?