Tina.
Blaine debated for all of three seconds whether he should do something before realizing that this was Tina. This was one of his best friends. And no matter how insensitive she'd just been in the choir room she was still one of the people he cared most about in the world and there was no way he wanted to see her cry.
He exchanged a concerned look with Kurt, finally stepping into action as Tina's locker slammed and he reached out to grab onto her upper arm gently before she could walk away. When she finally looked up, the puffy eyes and reddened cheeks broke something in Blaine's heart.
"T. Tina" he said gently while at the same time motioning for Kurt to leave them alone, knowing that if this had anything to do with earlier it was probably best if it was just the two of them.
"Hey. I'm sorry if I seemed too harsh in there. Kurt's just. He's having a hard time. And I'm…"
Blaine broke off when Tina looked down again, her eyes directed away from him and he loosened his hold on the other girl.
When Tina finally looked back up she shook her head. "I.. I didnt know Blaine" she said in little more than a whisper. "I thought he was just here to do the same as the wedding. I know. I know we talked about it"
Blaine nodded as he grabbed Tina's hand and pulled her into a nearby empty classroom. "It's fine T. We're all over it. Kurt won't care. I don't care"
Tina shook her head. "No. No. I don't know whats wrong with me. You guys can just go back to where everything is okay. And you're happy and laughing. And I.. I have no one. Mike..We're just"
Blaine frowned to himself when everything finally clicked into place and he immediately moved forward to tightly wrap his friend in a hug. "Hey. No..You're never alone okay?" He didn't try to debate the fact that Kurt and himself weren't perfect again, just needing Tina to feel okay again. "We're all here for you and especially me. You're one of my best friends and I love you. I do. Okay?"
And through the final sniffles Tina nodded into Blaines shoulder. "Y-Yeah"