Cheryl Tweedy is over the moon about Nicola Roberts’ engagement. Nicola, 38, recently got engaged to businessman and semi-professional soccer player Mitch Hahn, two years after they started dating, and Nicola’s Girls Aloud bandmate Cheryl, 41, is thrilled that Nicola has found love. A source told Closer magazine: “Cheryl’s over the moon for Nicola. It means the world to her to see her best friend happy, especially after she has had so much heartache in the past. She adores Mitch and knows how long Nicola has waited for this. “She can’t wait for all the wedding planning, the bridesmaid dress sh…