The closest word I can think of is a sycophant but that’s too strong word and not exactly what I’m looking for. The word I’m thinking of has negative connotations and it’s for someone who is friends with different groups but only at a superficial level and isn’t necessarily honest about who all they’re friends with. This person would be seen as untrustworthy.
You all are harsh.
“A social butterfly is a slang term for a person who is socially dynamic, successful at networking, charismatic, and personally gregarious. Usually, social butterflies don’t belong to a particular group, but rather jump from one group to another.” Wikipedia
Edit: Perhaps it doesn’t answer the question because it’s not a single word. It came to mind immediately though. Maybe start there and look for synonyms?