How to control anger towards siblings?

I get angry towards my brothers or sometimes towards my sister or even on cousins for their behaviour with me. When they don't talk with me or when they don't care of my point of view or call me "baby" as I am the youngest child in the family (but my age is 30 now and I have one kid too). I get so much angry that I pray bad for them. This is also not good for me. How to handle anger towards siblings?