Roast the fuck out of your friend. He is trying to fuck your girl. And you seem to be a pushover. Get a hold of yourself. You have much, much to learn. Learn how to be a man first. Your friend should not even think about talking down to you in front of your girl. He is not your friend. Read more. Learn how to be a man. In practical terms, do heavy boundary enforcement, and express and have explicit unapologetic supreme priority self interest and selfishness.