choices

So my manager it's all like Inlove with me & today he surprise me with beautiful red rosses at my other job. And don't get me wrong they are gorgeous and it was really sweet of him but I don't like him , like that and I honestly don't know how to tell him that. Just cuz he's my manager.!!! Idk what to do. I don't want to get his hopes up but at the same time I feel like if I say something it will effect us when we work together.