Callum without a doubt.
He keeps saying that Charlie and him have sorted things out and they are mates.
Then last night we see him telling Sam that he fancies Charlie.
Callum is obsessed with Charlie and Dexter.
Now today he showed Charlie what he had made from the wire of a Champagne bottle ,he looks through it at Dexter .Not weird or obsessive at all.

Not sure they are all pretty annoying

Voted Callum because everything he does or says regarding it just makes me feel really embarrassed for him, he is the cringiest guy. Dexter is sort of the same but realises what a muppet he is and is more of a comedy figure, and Charlie just has no real clue how to deal with the situation so just seems like she is trying to ignore it

Completely split between the boys but went for Callum because even though he moans about it even being a thing, he keeps bringing it up