I kissed you because I wanted to. Not because I felt obligated.

[He wants to make that much Very Clear. Because he knows that if he was even the slightest bit vague about it, Keith would torture himself with guilt until the end of time.]

I don't know yet if I feel the same, but I know I love you.

[Shiro cares about everyone. He's always been free and easy with his affections. But he loves Keith.]

And I want to... try. I can't guarantee it'll go the way you want, but. I want to try.