Certified GKH Gardening Expert
Unfortunately, the picture is too far away to see any details. It will be important to see the number of petals per flower, tree bark, any any other small details that I can't see from this photo.
Possibilities range from a few different genera, possibly, from Weigela to Nerium, Loropetalum, Leptospermum, or even Bougainvillea.
Since you are able to see details of your tree closer than I can from these photos, I would start by comparing to some of those shrubs that I have listed. Likely, it is one of those.
Otherwise, you can take a sample to your local extension service, and they may be able to help: