You have little control on the lives of others.
The way they act, what they feel, how they behave. What they are going to do. Whether they are happy or sad. Whether they are decent human beings or treat everyone unfairly. The choices they are going to make. How they are going to react to a bad turn of events. The impact they will have in the world.
The most you can hope for is to show a way. To give kindness and presence. To make mistakes and say you are sorry. To be sad and talk about it. To be happy and share the feeling with those you love. To play, laugh, and support.
At some point, you have to let go. Before that, be the best version of yourself.