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Originally Posted by Vanessa

But Dan doesn't like Dexter, so i think he meant it as an insult.

Did you not hear Dan saying he wanted to dislike him, but he actually loved him at times? That scene between Dan and Gina was my favourite part of the show tonight. I thought it was hilarious and a bit touching. It made me like Dexter more from looking at him from Dan's point of view.
Dan was talking about Dex in an affectionate way, much like you would do with a younger brother who you love but gets on your nerves at times.