I'd like to get on with the story with me and my girl. Anybody know how how to accelerate the storyline? I've got Shadowkeeper and but I really don't want to just play with it and run the risk of messing up my game.

You don't need ShadowCheater for that.

Peek here and download the Romancing Guide with all issues including the romance speeding up:
http://www.sorcerers.net/Games/BG2/index_tips.htm

Those commands you'll find inside won't mess your game as ShadowCheater tends to.

if you have cheats enabled, a quick way to get to the next romance dialog (assuming other variables such as location and certain quest completions) is

CLUAConsole:SetGlobal("WhoeverRomance","GLOBAL",1)

if that produces no results, do it again but change the 1 to 5000.

if that still does nothing then there's another variable besides game time that hasn't been met.

Like Amergin said you can easily do this using your CLUAConsole. When I get home I'll look it up for you.