FLOWERING TREE

Who can tell me what kind of tree this is? A few years ago I planted several trees which were then barely twigs. All of a sudden, last year, I realized some of them were getting pretty big and should be moved. This one was still spindly, but it was flowering, so a little while later, I moved it to the side of the house. It's doing fine, and this year is blooming very nicely, although it is still so small and frail looking, I doubted it would make it. But I don't know what it is. I don't believe it is a cherry.