Maybe you should talk to Spike. He earned one, or something. Might be able to sense one in you. Although I suspect he'll be whiney if he finds out he's not the only one here.
Vampires from different dimensions might be playing by different rules, though. Making a vow like that, and sticking to it - most regular vamps I've known (and yea, dusted) could never have done that. Let alone want to.
Peace sounds nice. Especially after a life of fighting. If you are doing good things (which is unexpected from a vamp), maybe you'll end up somewhere unexpected.