Nick Nelson's friends are starting to notice something different about him. Since meeting Charlie Spring, Nick seems more comfortable, more genuine, and more like himself, and even his friends can see it.
Nick may still be trying to understand what he feels for Charlie, but the people around him are beginning to notice the little things: the constant texting, the distracted smiles, and the way Charlie seems to bring out a softer, more authentic side of him.
That's one of the beautiful things about Heartstopper: sometimes falling for someone doesn't just change who you love, it reveals more of who you already are.