Cedric's protectiveness enhances their relationship in multiple ways. Firstly, it gives Harry a sense of security which he might not have had before. As a result, Harry becomes more open with Cedric. Secondly, it makes Cedric seem more heroic in Harry's eyes, and Harry may start to look up to Cedric even more. Overall, their friendship becomes stronger and more meaningful due to this protectiveness.
The protectiveness has a profound impact on their relationship. For Harry, who has faced so many hardships and threats, Cedric's protectiveness is like a warm shield. It makes Harry feel valued and cared for. This, in turn, makes Harry more likely to confide in Cedric, share his fears and hopes. For Cedric, being protective is a way to show his affection for Harry. It creates a mutual respect and admiration between them. Their relationship evolves from just being classmates or acquaintances to a deep and meaningful friendship, with Cedric as a sort of guardian figure for Harry at times.
It deepens their bond. Harry starts to trust Cedric more, seeing him as a reliable friend. This protectiveness makes Harry feel safe around Cedric.