Sam - Well, going by the movies, he doesn't use words to express what he's feeling.
Boromir - All he has to do is stand beside Legolas and when the lady's flock to Legolas, they'll see Boromir and they'll fall for him to.
Arwen - She just cheats on everyone. And knocks Glrofindel out!!!
Eowyn - Has no time for love. She's to busy fawning over an 80 year old King.