I'm angry about my friends not including me
Can you repeat what you said?
I am angry about my friends not including me
It is very understandable to want to be included in other peoples plans. You might want to make plans and invite people so they see you as friendly and return the favor.
It makes me so angry sometimes.
I think all people want to be included in others plans. Have you tried planning something and inviting the others? It might help them include them in the future.