The way Legolas and Arwen approach falling in love with a mortal is really, really funny to me because
Arwen: I will give up my immortality, and my chance to see my mother and father again, because I would rather die with you than live forever after you’re gone.
Legolas, building a ship: Hey Gimli have you ever heard of this little thing called breaking and entering because we’re going to do it to heaven.
You are a daughter of kings. A shieldmaiden of Rohan. I do not think that will be your fate.
And he looked at the slain, recalling their names. Then suddenly he beheld his sister Éowyn as she lay, and he knew her. He stood a moment as a man who is pierced in the midst of a cry by an arrow through the heart; and then his face went deathly white; and a cold fury rose in him, so that all speech failed him for a while. A fey mood took him.
‘Éowyn, Éowyn!’ he cried at last: ‘Éowyn, how come you here? What madness or devilry is this? Death, death, death! Death take us all!’ . The Return of the King, J. R. R. Tolkien.
Because I’m extremely tired of people dismissing the women of LotR, here’s a quick summary.
Rebelled against the Valar and decided to stay in Middle-earth, desiring to build a kingdom and rule over it. She was one of the few to distrust Annatar and later used the ring Nenya to protect and preserve her people, later throwing down the walls of Dol Guldur herself alongside Thranduil and his folk. She was notoriously prideful and ambitious, but a kind ruler all the same.
Niece of Theoden, she guarded Meduseld until the king’s return and upon being refused to ride alongside the men to battle, Eowyn disguised herself as a man and fought at the Battle of the Pelennor Fields. There, she challenged the Witch-king and defended the mortally wounded Theoden, slaying the Lord of the Nazgul and fulfilling an ancient prophecy issued by Glorfindel himself at the Battle of Fornost near an age ago.
The daughter of Elrond, she promised herself to Aragorn, a mortal man, and wove him a banner which he then used as his sigil throughout the War of the Ring. Arwen made the choice to stay in Middle-earth in order to be with Aragorn, not sailing West with her father and kindred, and in turn deciding to die a mortal death.
Your time will come. You will face the same Evil, and you will defeat it.