If you are a woman and still single and wondering why—here are some possible reasons:

If you are living in New York City, the odds of meeting an eligible man are not in your favor. In Manhattan there are 38 percent more young female college grads than male. And nine to twelve percent are gay males.

Because there is any oversupply of woman, guys are more likely to delay marriage and play the field. And dating seems to be out and the hookup culture is in. There seems to be no reason to wine and dine someone.

Also the gender imbalance is on college campuses and men, are having a field day. They may see no need to end their fun by settling down. For women, the longer a girl settles for casual sex and opposed to a long-term relationship, the more chances she has of ending up single.

You have to go to the “right” college. Facebook did a study a few years ago on how couples met. It turned out that 25 percent met their significant others in college or grad school. Men who met their wives in college were not the ones who attended colleges that were disproportionately female. They attended colleges that were majority male.

Maybe you’re not aggressive enough! The aggressive women are the ones more likely to get a guy. When a guy has several options, they usually marry the women who pursued them the most. Guys like to be pursued.

Ultimatums work! Maybe it’s time for you to give your guy an ultimatum. If a guy keeps putting off getting married, maybe it’s time to walk away. You may be just wasting your time staying with him.

Are you too religious? If you only date someone with the same religion as you, you may never meet the right person.

Maybe you’re too picky. When women are too picky and wait to find the “right” person, the dating pool gets much smaller. It’s like musical chairs. In the first round, fresh into the dating market, nearly every women gets a chair. By the final round, the chances of losing are 50 percent. Then you end up with men who have already been married and may have children. It makes a marriage more complicated.