Prom to be memorable sendoff for high school pals bound for ffertnt colleges. 4 TREND: ROMANTIC Romance is back this year and the big story is tulle. Short or long, find it at every formal event this spring. On Maddy, Vera Wang green and yellow tulle gown, $300; on Sam, BCBG pink tulle dress, $278. Vintage-style handbag on Maddy, $40; Moyna pink beaded handbag on Sam, $45 — available at Guys N' Gals, West Bloomfield NMI