How do you know if a 52 year old is interested in a 48 year old woman?

It was like love at first sight in a way. We met at the end of a singles party about a month ago, (glancing at each other throughout the night) and have went out every Saturday since, but no kiss good night yet. We have also e-mailed each other a bit and spoken on the phone about our next event.
We are going to the play house Thursday night and I don’t know what to expect! When we are together the time flies, we laugh, and dance close. I have not dated in 6 years.