I hate not being able to leave reviews on AC, but just wanted to tell you I read the first three chapters of If I Knew Then and am enjoying the story so far! I like how you're weaving in real events, like the ALAYLM video shoot, and showing how Nick and Brian's relationship changed. Nick's jealousy of Leighanne actually makes the slash storyline pretty believable.
One minor nitpicky thing - you might want to make Nick turn 17 instead of 18 in the first chapter because they filmed ALAYLM in 1997, not 1998. Otherwise, great start!!