Based on the promo for 6x14.

Stefan sighed as he leaned against one of the pillars holding up the porch of the Forbes' cabin. Caroline stepped onto the wood floor and walked to him. Without even thinking their hands found each other. Neither of them spoke at first, and the silence was comforting in it's own way. Almost a year ago Caroline was standing on this porch watching Stefan and Elena whispering to one another. Now, she wished the only thing she had to worry about was her jealousy, this time there was something much bigger on her mind.

"I don't think I'll be able to get through this on my own." she finally admitted, not just to Stefan, but to herself.

Stefan looked at her with confusion. Of course she wouldn't be on her own. "You have me." he told her. Didn't she know that? This girl standing in front him meant more to him than he could even explain. He had been an idiot not to see it from the beginning. "I am so sorry I let you down before. I know that's why don't want to trust me, but I promise you I'm staying."

Caroline bit her lip at his words. She didn't want to cry, she wanted a happy memory with him. But Stefan knew her all too well, he softly moved a curl away from her face. If his words weren't enough to convince her, then he'd show her how much she meant to him. His thumb gently moved across her cheek as he leaned into her. Her lips were soft and he felt her smile as he moved his hands to her waist. He pulled away, not wanting to be greedy with her. She smiled up at him, their bodies still touching.

"I'm staying, Caroline." he repeated and in that moment all of her doubts washed away.