Us Magazine Reports What has Janet Jackson’s boyfriend done for her lately? A source tells Us Weekly that Qatari billionaire Wissam Al Mana “gave her a huge, expensive ring” earlier this year. “She’s afraid it will get lost, so she keeps it locked up!” The luxury-brand mogul, 37, will spare no expense on his nuptials to Miss Jackson, set for spring in Qatar. The affair “will cost millions,” reveals a second Jackson insider. “He is flying in all of Janet’s friends and family on private jets.” Adds the source, “He wants to get a top chef to create a custom menu. “The ceremony will undoubtedly be “a circus,” another source…