Saying I love you for guys--is it a big deal?

from a guys perspective how big of a deal is it to say I love you to a girl? what changes in your mind when you realize you love someone?

i said it first to my boyfriend, when I said it he wasn't ready buthe talked about how much he liked me and stuff.. anyways like a week and a half later he said he loved me (he said it first and yes I know he meant it) he then went on to say that he hadn't wanted to fall in love with anyone and that id changed his life
Saying I love you for guys--is it a big deal?
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