[Loki huffs softly when the warmth that should come from the heater doesn't reach him at all.]

Indeed. That makes us friends but not b.f.f.'s. According to the great code of great friendship one gets the status of b.f.f. when a certain bond of trust is established. Friends merely enjoy eachother's company and wit.

[He isn't really expecting from Billy to trust him. For Loki trust will always be a huge issue. The only person he really trusts is Leah, and Leah is not here. He huffs a second time when he realizes he misses her a bit.]

As many people on Midgard say: 'there is a time for everything'.