I'm thinking about kicking my friend out of our D&D group.
Why do you want to kick him out of the d&d group?
He is boring and he is not good with the game.
You should teach him how to play better. The game can be a time for you and him to bond.
It's not my job to teach him.
Instead of excluding your friend from the group, maybe you should take him aside and help him workshop some ideas for his character. He may just be new to the game, or intimidated by it and could use some help. Part of being a good friend is helping your friend out when they're struggling.