After all these years, I just can't get rid of it.
I can't throw it away now, especially after keeping it all these years.
ーAfter all these years, I just can't get rid of it.
「今更それ（手紙）を処分できない」
after all these years で「今更・今となっては」
ーI can't throw it away now, especially after keeping it all these years.
「何年もそれ（手紙）を持っていて、今さら捨てられないよ」
I can't throw ... away now で「今更…を捨てられない」
ご参考まで！
カナダ 
