while I have no idea what this implicates exactly, I have observed that some snakes can tell the difference between people and consistently prefer one person over another
I also see that sometimes when I have several garters co-housing, a couple of them will be together all the time, whereas other times, even if there are only two in a cage, they may not spend any time together
even insects have social behaviour
and ascribing social behaviour and even preferences and attachments to snakes is not necessarily anthropomorphism
when you endow certain social behaviours with human emotions and motivations - that's another matter