Katie Holmes has gushed that she’s “proud” of daughter Suri as she prepares to head to university. The 18-year-old offspring of the 45-year-old actress and her ex-husband Tom Cruise, 62, is said to be headed to Carnegie Mellon University in Pittsburgh, Pennsylvania, and although her mom will “miss” her, she’s excited for her to experience college life and find herself. In rare comments about her daughter, she told Town and Country magazine: “I’m proud of my daughter. “Of course, I will miss the close proximity, but I’m really proud of her and I’m happy.” The ‘Dawson’s Creek’ alum, who has fond…