Madness seems to be catching, let's hope it is not hereditary! That was my first emotional reaction, reading about Eomer abducting Lothiriel, but when I thought it over, I had to admit that it is quite in tune with the general atmosphere of the story and throughout logical with regard to how the two protagonists have been presented up to now. Tolkien himself presents Eomer as a man who is able of rather strong emotions and can be swept away by them past any limit, as his actions on the Pelennor, where he rather recklessly risked his army, show. His reputation in Minas Tirith being lost anyway, he does just what general gossip believes him capable of: He abducts her "in a fit of unrequited love".
I'm just not sure if it really was a fit or a planned action, because as we come to realize now, he must have done quite a bit of planning during the last days, not only while Lothiriel slept and finds after waking up that she does not like his "self-satisfied smile on bit",but aswell later in the same chapter, when a boat is rowed upstream past her hidingplace while "Leona" is in the nearby village. So some planning obviously is there in showing up on the pier, but I'm not so sure if he was determined to abduct her before talking to her.
Why? Well, he promised her that he would not do anything against her will, and I do not expect such a violation of character at the end of a story that has up to now not shown any kind of that. Look at her contradictory behaviour, when she talks about Eomer with her father and her brother! Imrahil has quite a reason to sigh! And then: She is an incredibly bad liar, and throughout the story "Leona" was well able to understand her true thoughts and feelings, regardless of what she told him.
If we now look at their talk on the pier, and read about her thoughts and feelings, we can well imagine what Eomer can see plainly: She wants to throw herself in his arms, but she can't, as a matter of principle! And when she turns away to hide her tears, we can be quite sure that he knows she is crying. So perhaps he acts on the spot, like when he kissed her at the end of the journey, because he realizes that there won't be another chance for them!
Oh my...I've written quite a lot in defence of madness, but anyway: It's spring folks!
Thank you Lia, for a nice surprise!