Do I have the right to be angry at my friend for making excuses to not join us?

Now I understand people have to work in all and things happen but at least come out and have some fun. We asked our friend if she was planning to go to the event but she said she may not make it because she has things to do. I asked her when will she think she will be done? She didn’t answer back right away. I think she making an excuse to not go. I know she works full time and has a lot of homework but homework should not be the only excuse to not do anything. She can stop take a break and come with us, then she can come back to her work. It’s that simple. It’s from 2:00-3:30. She can make it. She’s lying to us!

She said she has a lot of homework to work on. I rolled my eyes and said, “Oh come on! That’s it? You could have worked on it parts at a time so you would have so much on the weekends. Life a damn little!”

She said, “Girl I work, five days a week 40 hours a week. There’s a lot of reading, writing and studying. You try working full time and going to school online.”
Should she go or not?

Do I have the right to be angry at my friend for making excuses to not join us?
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