I think this is a pretty popular sets of words in the writer world. Every querying writer has an agent they wish would rep them. There's a million different reasons why a writer may want that agent. But what I keep seeing as I make my rounds is that writers are too blinded by their dream agent to really expand their options.
Don't just query your dream agent over and over, because if they don't want to work with you, that's tough love. There are plenty of other agents in the sea, and a lot of them are perhaps a better match for you than your dream agent.
Don't get bummed when your dream agent gives that polite 'no.' Open your doors. Don't let your depression limit you. You'll probably find that the agent that finally does say yes is that dream agent you've been searching for.