Jealousy Can Fester Even Between ‘Best Friends’
I think it is only natural as it is hardwired into humans

So, Ansh (name changed) & I met in our school in kindergarten, I guess. He used to sit with Sahil (name changed) and given how lively and jolly Ansh was, I had this desire and longing to sit with him, be around him. I really liked him (of course, as a friend :-P)