Playing with friends

I have a really good friend of mine that introduced me to league, i have always been close to him. But when every we play he has two moods. When we are doing well he is really funny and chill, when we are loosing or not doing well he gets very angry and starts to ridicule you and make you feel like crap. like every human, i make mistakes, and my friend verbally attacks me and i really just want to play league for fun and to get better. Not to be yelled at for making a mistake. He also has to be in control of everything, like shot calls or plays in lane. I don't know if i should still play with him or just play by myself or other people. Please Help!!!