I have been best friends with an entp for my whole life up until this past year in which we have drifted apart. It seems almost as in he has become obsessed with being popular and changes his personality to please those around him pushing away his old friends by ignoring them in a almost condescending manner. Recently he has started sneaking into abandon buildings with his cool friends and his grades have plummeted though he is normally an A student. It scares me because most of my life I have felt comfortable around him being an intj but recently he has made me feel insecure and unintelligent. What I really want to know is how to approach him about this since he tends to avoid close relationships. Any advice from entps or people who have excperience relating with them would be greatly appreciated.