Would Cancers get freaked out if...?

If I say straight to his face(seriously, and in a place where we're alone) how much i appreciate him and how he's like a big brother to me, or would they freak out like get shy around me? :3 Btw, he has Leo Venus and I thibk Aries Mars or was it Leo? Anyways, what woukd they do? I know its a no brainer question.. :3