Yea i think it may be more that he hasn't been able to find Nadia yet. Her love is still significant to him. He was able to move on with Shannon and also with Elsa, but that does not mean he has forgotten her. I think we will see her play a role in the future. Ben might use his love for her against him in some way.

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Because all we really need to survive is one person who truly loves us. And you have her.