When to say "I love you"?

Me and my wonderful girlfriend have been dating for 2 months now. I know you should say "I love you" whenever it feels the most appropriate, but even if you feel like you love someone, if you say it too early it can scare them off. In my case I feel that I really do love my girlfriend. We're going into college so I'm not some middle schooler lol. I know she talks of how I'm so genuinely sweet, how traditional, corny, cute, adorable, the-guy-every-women-deserves kinda person I am, but to me, that doesn't mean she loves me. I want to tell her sooooo badly but am not sure about it. Can you people tell me your thoughts on this often asked question?