I believe many INFPs can be awkward with "I love yous", even when we know the person is being genuine (BTW, it's rather uncanny how many INFPs have the ability to see through words, so unless we are highly infatuated or idealizing somebody-and even THEN-we usually *know* if somebody means "I love you.") It is good, I believe, that we don't throw around the phrase, because I feel most NFs (and especially, INFPs) won't just say such a thing to meet a standard of politeness-we usually mean it, or won't say it (if it's not easy to say it when we feel it, how much harder would it be to say it when we don't really feel that way? Thus must INFPs do mean the beautiful phrase.) When I was younger, I used to have problems receiving the phrase from even my relatives, and even to this day, it's not easy for me to say "I love you too!", although I clearly love my relatives, and even my friends. It's just that "I love you too"! It's just that in my head, "I love you" must be said from the heart, and even when it's on my heart, I have a hard time relating love to sheer politeness and social-dos. I have a much easier being lovey-dovey in writing, because I find it my most personal way of self-expression (besides music), and devoid of any obligatory pleasantries involved in actua conversation (not that I write in a rude or unpleasant manner, but I feel social interaction is too often codified in a way that you are not allowed to express yourself fully, or at least just as freely as you would in the written format-I realize this wouldn't be a problem for many other people, though.) Finally, I thing it gets better with age (at least, it did IME), as even though I am ocassionally awkward and still doesn't come out very easily out of my mouth in day-to-day interaction, I don't have a problem either accepting or giving out a genuine I love you when it's warranted and the right time to do so (and you'll never catch me lying with the "I love you" phrase-if I said I love you, I really do!)