White flashed peach tree with curly leaves fungus

Hello everyone, 

I inherited a lovely peach tree (15 years old), unfortunately it has curly leaves fungus and I didn't want to treat it with copper cause i thought the tree could have coped with it and I didn't like the idea of spreading copper around the garden. 

It used to make probably 50 peaches per year. Last year there were less peaches on it but still a lot. 

This year the leaves got not only curly but also really small and no peaches at all. Maybe it got another fungus on top of the curly one? 

Can anybody tell me how to save it and what to do now? I would use copper or anything in order to save it. I really didn't expect it to die I feel sorry I didn't treat it in the past two years  

Attached a picture from last summer peaches and few pictures of its condition now.

Thanks everyone for their time

ciao

claudia