can't get over (something)
Unable or unwilling to accept or believe something. Often used hyperbolically. I just can't get over the fact that our team lost at the last minute like that. That movie was so fantastic, I can't get over it!
I can't get over something
! Fig. I am just so amazed! (The something can be a fact or a pronoun, such as that or it. Also with just, as in the examples.) "I just can't get over the way everybody pitched in and helped," said Alice. Bob: The very idea, Sue and Tom doing something like that! Bill: I can't get over it!