Am I wrong for thinking this?

Yesterday I call my bestie because a friend invited people over to play board games and told me to come and invite her also. She declined telling me she couldn’t go out because she already went out with her boyfriend the day before and she had to study for her final work on wednesday. I understand everything, but I was trying to say that we weren’t going to come home late, it was going to be a chill night. Anyway she didn’t change her mind and I was so jealous because if she was really busy like she assumed, she wouldn’t have gone out with the boyfriend neither. I know this may come from jealousy, I just feel like she always put her relationships over me, doesn’t matter if she just knew them. This happened with her ex too. There wasn’t a time where I could feel really close to her. What do y’all think?