NEW YORK — Ashton Kutcher is planning to propose his girlfriend Mila Kunis soon, the Press Trust of India recently reported. Kutcher has known Kunis for 16 years now, and he plans to marry her after completing his divorce formalities with Demi Moore.”They plan to get engaged soon. Being with Mila brought Ashton back to who he really is. He's not playing the field, he's focused on enjoying Mila and the happiness she brings,” a source said. “She doesn't get jealous like Demi used to. He calls her because he wants to and when they're apart they talk constantly,” the source added. — SG