You have him curious. CURIOUS is where you want him to be. When you have a man curious all sorts of things go through his mind... Is there someone else? Have I screwed up the best thing that ever happened to me? Does she still love me? No, she loves me too much. I don't have to worry about Britt.
Back and forth... round and round goes the mind.. (kind of like your mind has been doing because of the curiosity that he has been driving you crazy)
He was checking up on you. Bank on it. What? He only takes a pee once every seven weeks? He is now in the position of KNOWING that someone else IS seriously interested in you and it is driving him crazy about who it is and if you are interested back. He is looking for evidence. (remember he is a cop and they are by nature and trained to look for evidence.) give him nothing. Offer nothing.
Don't throw away the power of curiosity and jealousy. You would be wise to not let on exactly how you feel right now. Men respond better when they are wondering what you are thinking. A bit distant. In your own little world. Suddenly not reaching out or seeming desperate. Short to the point answers but nothing more. No flirting back..
If you allow him to know for sure that you will always be here for him then he has no insentive to come back.