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.
Hmm I think it’s fine if someone is a social butterfly, they don’t have bad intentions etc. I am talking about someone who seems like you can trust them but actually they have other loyalties, I live in a place where people get arrested for supporting democracy for example