Street tree bending over
Nick, it would be a good idea to prune back the top by maybe as much as 1/4 of the top growth. Then run a pole up the side of it to support it. But after a year or two you will need to remove the pole so it can grow on its own. Keep an eye on the tape you have put around the pole and tree so doesn't strangle the tree. It also may be in too much shade or fed too much nitrogen for excessive top growth. But all this rain this spring has caused lots of growth. This also is a problem in the summer if we have a drought or really dry spell and the tree has a lot of new growth that it has to support.