Question

But they will never notice it's their behaviour which made you change mean in hindi

Answer 1

लेकिन वे कभी यह नोटिस नहीं करेंगे कि यह उनका व्यवहार है जिसने आपको बदल दिया है

Answer 2

unhone kabhi notice hi ni kiya....ki yeh unka behaviour hai jo tumhe change kr diya....