He grinned into the kiss when he felt Flynn press back to him. It gave him more confidence. The fact that Flynn was pressing back means that he, at least, had some amount of feelings for him.

When they broke apart, Flynn had teared up once again. He looked confused. When the other asked him the question he gave him a small smile. "Silly," he said "I kissed you because I love you. Why else would I kiss you?"

Seeing the boy was still confused he started to explain further. "Well, Flynn, I've had feelings for you for a while now. I wasn't sure how you would react or what would happen if I said anything, so I didn't. But seeing you in such pain really does break my heart and I want you to know that I'm still here for you." with all that said, he gave him a smile and kissed Flynn's cheek.