Why am I dreaming of my late husband almost nightly all of a sudden?

My late husband.....we divorced prior to his passing but it was not your typical divorce. It was complicated. I loved him immensely and he loved me. He died just over 5 years ago. Myself and my adult daughter find pennies frequently and receive other signs that are often very uncanny. We often see his name on signs when we are together and then, will find a penny. Last week, my son got on a plane and the man next to him introduced himself with the same name. I walked out of a store two weeks ago thinking of him and thought, "wouldn't it be crazy if there's a penny beneath my drivers door on the asphalt..." and there it was. I was quite shaken and in tears. Although I am remarried, I think about him daily and even cry at times. My question is this: lately (the last month or so) I dream about him all the time. I can't always remember the details but upon waking, I realize I've dreamt of him yet again. Why is this? And he's always in his 20-30s when we were young and dating/married. I wish I could communicate with him.