Male friend bought me flowers, I'm uncomfortable, what should I do?

My guy friend sent me flowers in the post and wrote a card saying he was trying a romantic gesture. He asked me out in March and I said no, he has been dating my friend for the last month casually and they stopped earlier this week and now I've received these flowers. How do I tell him no, get him to listen and still keep him as a friend? We hang out so much and get along so well. I'm so uncomfortable that he sent these. Any advice on how to handle this would be great, I do not want to hurt or lose this friend, he is so amazing but I cannot make the romantic leap.

Male friend bought me flowers, I'm uncomfortable, what should I do?
Post Opinion