remus+liv
First, I think he needs time to work through his feelings of shock. Of course he doesn't know whether to trust you or what kind of monster you've become, he's still shocked and you lied to him (whether the reasons were good or not).
Second, I think that if he does that and takes that time, and then proceeds to still be an arse, then drop him. You don't need people who think that about you. You can't blame them for it, either, but you can choose not to deal with it.