There is nothing YOU can do to change or fix HIS problems. He is displaying a pattern of behavior that shows he can be abusive. BELIEVE what people do and say, don't stick your head in the sand thinking "I think "I" can fix this and make it perfect".

You are being groomed to give into his control. This always ends badly and it's more important YOU find out why you are willing to accept this kind of behavior. If you friends don't like him, PAY ATTENTION to that, they can see him for what he is and HE knows it. When people that care about you express concerns LISTEN.