Read on Twitter
Ever notice the way that when Blaine is sadder, fearful, he'd tucks his head closer to Kurt's neck verses when he's happy, joyful, he rests his head on Kurt's shoulder.
We all know that Kurt is Blaine's home and I feel like when he's scared, sad, and really needing to rely on Kurt- he tucks his head closer to his neck so he can hear his heartbeat, make sure Kurt really isn't going away because he's still hear. He can hold him, (+)
(+) grasp tightly, and listen to the gentle thumps of his pulse reminding him that this isn't make believe. That this is real. Everything will be okay. They will be okay.
Another time backing this up more, Tested, when Blaine told Kurt he was insecure- when they hugged, Blaine immediately tucked his head into Kurt's neck, 'he's not going to leave me, he's not going to leave me'
When he's happy, so in love with Kurt, he rests his head upon Kurt's shoulder. Letting himself relax and enjoy this, this feeling of being filled with so much love. Something we all know that he didn't get much of.
End of thread, this was just an analysis 
