Most elves have had a hard time, some even sailed to the undying lands, remember? but Galadriel, I think, has had the hardest time. Because she's a ring bearer and she said "To be a ring bearer is to be alone" which I think someone mentioned earlier in this thread. She was also one of the last of her kin and was banned from various places and her Grandaughter is dying (where Elrond comes in too i suppose) She was also tempted by the one ring and she is confined to LothLorien, seldom allowed to wander to her hearts content without bodyguards. So really her life is very long and a little bit boring!