I'd give one to everyone~ <33
Mostly friendly, maybe a few 'secret admirer' ones since I always seem to crush on boys from afar. xD;
Every girl would get a friendly valentines card from me .... no doubt, I'd like to befriend everyone!!

And for the characters:

Allen: He'd give one to Lenalee definitely, if you don't get it .... your crazy. o.o;
Lenalee: She'd give one to every dude. >.>; Slut ... -cough-
Kanda: A couple valentines, then another from Allen saying, 'Happy valentines day Bakanda; I love you. despise you. biggrin '
Lavi: He would give them to everyone~!! Yay, Lavi! x3
Bak: He'd give tons to Lenalee. :]