How do I call out my roommate on his lies (read details)?

I am very close with my college roommate, and he is like a brother to me. But he tells a lot of lies about where he is from and where he grew up. He claims he is from the hard part of Philly, but he went to a school an hour outside of Philly. He used to tell people that his little cousin was actually his son and he... show more I am very close with my college roommate, and he is like a brother to me. But he tells a lot of lies about where he is from and where he grew up. He claims he is from the hard part of Philly, but he went to a school an hour outside of Philly. He used to tell people that his little cousin was actually his son and he was serious about it. He also sometimes tells people he was a lifelong vegan when he was really only a vegan for like 7 months. I want to confront him about these lies successfully, but he always gets super defensive and has more lies thought out.
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