Dimitri and Rose aren't seen that much together but they are in the 本 quite a lot によって themselves with small mentions here and there of their exsisting romance. I really suggest 読書 them. You're probably thinking the same thing as I was before readint them, that they aren't as good as Vampire Academy because they don't have Romitri in it. Honestly, they're great and I'm addicted to them now :D
I won't say much if あなた haven't already read the books, but Dimitri and Rose appear in Bloodlines and The Indigo Spell. Only Dimitri himself appears in The Golden Lily, and Rose is mentioned in every book. I mean, she's Rose!