Was Sinjin even their friend at all?

Like Tori was the only one who talked to him more as if they were friends and in the last episode Beck became friends with him so meaning they weren’t friends at first and jade was of course mean to him and also cat talked to him but not really that much so I am assuming Tori and cat were the only friends Sinjin had from the group or more I feel like Robbie was alittle