(Undated)  --  Washington is one of the best places to live for singles.  That's according to a new WalletHub survey, which compares the 50 states and the District of Columbia across 23 key indicators of dating-friendliness.  Washington state is in first place, with important factors including "share of single adults" to "movie costs" to "nightlife options per capita."  Oregon is in 22nd place, according to WalletHub.  Colorado, California, Montana, and South Dakota round out the top five.