[Remus will have to get used to the idea that he can be in a relationship. That it's okay to act on his attraction, if only because it's Sirius. He's going to have to accustom himself to kissing, and touching, and everything that may come after; all prospects that seem far less daunting than the idea that he actually cares this deeply for his best friend.

Remus will have to get used to the idea that he's head-over-heels in love with Sirius Black, and all the complications that may arise thereof.]

Promise me. [Remus gasps when he finally manages to part himself from Sirius again.] Promise me you mean that. Because if I do this, if I get into this with you, and you decide you don't want me, I can't--

I love you.