You can only be in love for the first time once, so it is not surprising that she doesn't look at you the same way. She was young and foolish when those pictures were taken, and don't forget that they were probably posed, and not natural.

Anyway, you know very well that she doesn't love him any more, so why try to compare yourself? Forget the pictures - they are momentos for her children for later on (he is a part of their history and they will want the pictures).