I have said "I love you" to my girlfriend but she never says it back.

Anonymous
I have said I love you to my girlfriend on a couple different occasions two in particular worry me. Both of these times I poured my heart out on her Wall on Facebook. One time she said that she liked me a whole lot... the second time nothing, she didn't even "like" it. She shows affection in other ways.

She never even uses the phrase in private.

Should I be worried that my girlfriend will not simply say that she loves me in a straightforward and public way?
Updates
+1 y
In case anyone else says it, Yes I have said it to her face. She hasn't responded with a simple I love you then either.
I have said "I love you" to my girlfriend but she never says it back.
7 Opinion