I have a thriving Cherry Blossom Tree (two years old).My fear is that it will become too big for my garden.
I want the to tree to live!
Giletta, we want your tree to live, too! Here is a very good website for guidance about pruning. You can also go to YouTube and search videos unsing search term "How to prune a tree."
Or if possible move it while it is very young so it has more space. Move it very early in the spring before it starts to leaf out, if you must move it. Best of luck. ep