Ich liebe dich - German
Well... yes and no :)
There's "ich liebe dich" and "ich habe dich lieb". And both are appropriate in relationships, yet the meaning is slightly different. I guess "ich liebe dich" is like "I love you deeply" or something similar. There's a much more intense commitment implied, or should be. But even when it is the case, you can say "ich habe dich lieb" as well, because it is a different thing and also worth saying. It's the "you are very special to me, I care about you – in that sense: I love you" thing.
You can say "ich habe dich lieb" much earlier in a relationship, and you should pay attention never to cheapen "ich liebe dich" by saying it too often.