It's clear some of you have your own biases towards "married" men, but not every single person going through a divorce or separation is "using" the person they are in a current relationship.
I can think of a few I personally know that met their current wives during their separation, or before their divorces were finalized. I guess their plan was to use the girlfriends in order to marry them and live happily ever after.
We don't know anything about the OP and her relationship, you can assume things all you want though.