I'm not sure

At the checkout counter of the supermarket the guy standing in line behind me says to me: "I can see you don't live alone". He obviously refers to the truckload of items in my trolley.

"No I don't", I smile back.

"Pity", he says. "We could have had a great time together."

I look at him.

He's about 30 years older than I am.

I'm 45.

I'm not sure whether to take it as a compliment.