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.
Interacting with different groups of people has nothing to do with being earnest or forthright.
I have friend groups that dont interact, but it has nothing to do with them. These are people from differnet parts of my life like work or different hobbies that could co-mingle, but life is too complicated to actually sort that out. I dont really overly discuss one group with another unless interests cross. It’s nothing personal, it’s simply that these groups exist largely in separate parts of my life, so they tend to stay there.