What does it mean when a guy says he can't describe his feelings towards you?

[jloveboothang]

I told this guy how i felt about him and then he said wow. I asked him what were his feelings towards me and he said he can't describe them. What does that mean?

[BiffWebster]

sometimes a girl just makes a guy feel different... for the best actually. A wonderful woman can make a guy do things differently, and want to be better, you know feel better about themselves.

yet they sometimes just have no idea what to say when you ask who they feel.

the dude probably can't describe his feelings as good as you can, so he doesn't want to sound corny or as if he doesn't care. if he loves you he will... just needs to get the words together

[DimaUK]

He may have a hard time telling how he feels, happens to a lot of men.
I usualy find it easyer from writte down how i feel and just send SMS, there is no pressure and i can evaluate how i feel.

What does it mean?
Complex feelings or just like i said, he ain't cut to talk about his feelings