There are many ways to do this. You can read a book, or listen to the radio, or watch TV for company. I personally don't think its a problem to distract yourself in these instances, although modern pop psychology might disagree. Books are excellent companions and there are have been many meals in my life that were enhanced by their company.
If weather permits, you can pack up your meal and head to a park or a beach and dine 'alone with others.' On a similar note, you can decide to go out to eat and take advantage of the communal tables and bar seating that many restaurants have these days. Or even occupy a small table if that's available. You can also just accept the fact that for tonight at least you're dining alone, but then make a few dinner dates for the week ahead. Or you can spontaneously ask a neighbor or colleague over for dinner.
How do you work with those times when eating alone feels lonely?
Related: Cooking for One: Eating Alone
(Image: Dana Velden)