So I like this very decent sort of guy (Christian, doesn't drink) who I've known about 7 months now. When we met I was attached, but shortly after my ex-dude turned into a schmuck and we broke up. Been seeing a lot of this other guy lately- talking a lot, saying "really nice to see you," when we bump into each other, etc., etc. Looks like we'll both be at the same party tomorrow. Tips on a) flirting in a clear but unscary and friendly way, and b) gauging his interest?