You have a group of close friends. One of them tries to be friends with other people to, like normal people, but does it in a cringey way. They act differently and may sound/look desperate. This is cheebing

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.