Why is Elain resistant to her mating bond?

I am curious to hear other people theories.

I like Lucien I think overall he is a kind man who has had horrible things happen to him. I think he has had a hard time finding his place in the world and it's heart breaking that is feel slide he has no home or close friends. I think he could have fit perfectly in the inner circle but that never comes to be.

I think his quiet kindness matches well with Elains gentle kindness, yet she resists the bond almost seemingly at all costs. I get the sense she knows it there but it scares her. But I wonder if it's something more.

He is a kind man, and she has every right to refuse the bond. I am just so confused why she doesn't even to try and gently expire that possibility.

Curios about other people's thoughts?