User blog comment:Thewritersdiary/Bellarke . . . or Clexa?/@comment-25176701-20151118013724/@comment-26500342-20151120044958

I personally think that Bellamy was learning to trust himself but what is making him doubtful now is what he did in Mount Weather. One big choice he and Clarke made resulted with the deaths of hundreds. Even if they had no choice, I'm not sure if he can really see that at the moment. Not to mention that he is probably still in shock and grieving in his own way. I believe he was planning on going through that process of healing with Clarke by his side, which I suspect might have been an underlying meaning of "together" when they pulled that lever. Unfortunately, she ran off and now he doesn't know how to deal with what he did alone. Correct me if I'm wrong, but I never thought he and Monty were exactly close and I can't see them having a heart-to-heart. They don't have the same connection as Bellamy and Clarke did as leaders.

Another factor of it is that even near the end of Season 2, he always kind of considered Clarke to be more pure than himself (although I would disagree). So the fact that she was so broken by their decision that she ran off probably threw him off guard. If Clarke couldn't find a better way out of their situation, how was he expected to? Just a few theories.