This topic came up in discussion this weekend and I thought I'd ask here to see what the case was for everyone.
In your relationship, does one of you say 'I love you' first more often then the other, where the other person responds with 'I love you too' more? (Disclaimer: I'm not stating this means that either one loves the other more or less, just seeing if the initial stating of it is done more by one partner than the other.)
In my instance, I say it more often first and my partner responds. I definitely don't think it's because he means it any less, only that I grew up in a family who daily said 'I love you' to each other, thus I am more ok with saying it, whereas his family says it rarely so he wasn't used to saying it as much.