I don't want to go to my brother's wedding because he didn't want my children to come.
Why doesn't your brother want your kids to attend his wedding?
He doesn't seem to like them and it's rude of him to invite me but not my kids.
I'm sure you're frustrated with your brother for not inviting your kids to his wedding. Tell your brother that they are part of the family and should be invited to family events. Your family should care about your children as much as they care about you.
Ok I tried and nothing happened. My brother is being shitty.
I'm sorry to hear this is happening to you. I think it would be best to talk to your brother and to see why he is so set on not having your children at his wedding. This is an important subject that the two of you really should get to the bottom of since your kids are going to be around for future events as well.