We were a good friend Only, but after a year go I started loving her but never perposed bcs I worried to loose.
I had showne love and care as I could and she understand it,
What I think about her.
Time passes and, a week ago she told me that she found a boyfriend and committed to him, then I told her I love you also but can't tell u. As I said she started shouting and told me how dare you say like that you Broken my trust and much more... and from that day we stopped any communication
What I do bcs I don't want to loose her and truly speaking I never think wrong about her.

You should have told her a long time ago, waiting until she tells you she has found someone was just wrong.
She probably feels she can't be friends with now, knowing how you feel.
Maybe when she cools off she'll feel differently, but you should probably leave her alone. You missed your chance with her.