Sibling Problems..Ugh

The only thing that bothers me other than fighting with my mom, is fighting with my siblings. I love my older sister but there are somethings she can do that hurt me and she doesnt even know it. I know i need to tell her but its like confronting my friends i'll tell them what they have done to upset me and they will act like they care but in reality they dont. My older sister only calls just to talk to my mom. My sister doesnt feel like she can talk to me or my other sister and i would think she would because we're family. I've always went to her when something bothered me. From what i've been told my sister doesnt want to celebrate her birthday with me and my other sister. My mom says she doesnt want to only she wants to do it with her friends, well then why does she want my mom to be involve? So  its okay if my mom is involved but not her family. I would want to celebrate my birthdays with my sisters. My sister has a best friend shes known since she was born and basically shes her sister, i feel replaced. I think my sister doesnt think me and my little sister would understand or we're too young, i dont think so, i've had my heart broken, i've been betrayed. etc. I'm not a little kid. When my sister came out to visit us, she didnt even stay at the house and spent time with us. I've been there for my sister and i wish she knew there are other people she can talk to besides her friend and our mother.