今天我们碰到我的表哥

我跟我爸妈在回家的路上碰到我的表哥和他的孩子。他有三个孩子。我爸停车，然后他们俩下了车去寒暄。我没下车应为他没关窗，车里有些东西。他的孩子来个我请安。我们很久没见面。后来我不知道怎么跟他们聊天。我是一个沉默的人，不知道该怎么聊天。好尴尬😭
您有建言吗？如果有下次该做什么？

My parents and I met my cousin and his kids on the way home. He has three kids. My dad stopped the car, and they both got out to say hello. I didn't get out because he didn't close the window and there were some things in the car. His kids came to greet me. We haven't seen each other for a long time. Later I didn't know how to chat with them. I'm a quiet person and don't know how to chat. So embarrassing😭
Do you have any suggestions? If so, what should I do next time?