We like to think that we are all unique individuals, but the fact of the matter is that humans easily succumb to the herd mentality. From your politics to the college you attended to the shoes on your feet, your choices are largely shaped by the people you surround yourself with. Your girl is no different. If you are over 25 (22 in rural areas), go on Facebook and count how many people are a) engaged, b) already married, or c) complaining about how all of their friends are engaged. The hive-mind is contagious. If you have a buddy who is spending his late 20s or early 30s in non-wedded bliss with a confident professional woman, it is time to schedule a double date. Show your lady that there is more to life than wedding bells and assure her that she won't be the last of her friends down the aisle.
For good measure, encourage her to grab drinks with some of her embittered, divorced friends, which current statistics tell us will be over half of us. What wonderful times we live in.