What ever happened to the notion of "'Til death do us part"? With America's divorce rate sitting at sky-high levels, "'Til divorce do us part" is perhaps a more realistic wedding day exchange.

But amid the startling statistics, it's important to remember that marriages rarely die overnight. Most often, the signs and symptoms are present for a while. For that reason, it's important for you and your spouse to address any problems as they arise-so you can either work things out and remain married or make a mutual decision to separate or get divorced.

Although no test exists that can tell you if divorce is imminent, troubled marriages do tend to exhibit many of the same characteristics. Here, five signs your marriage could be in danger.

  1. You argue constantly. No relationship is perfect, and there are bound to be some disagreements along the way. But if you find yourself constantly quarrelling and can't seem to come to any type of agreement, your marriage may be in trouble. According to the Prevention and Relationship Enhancement Program (PREP), money is said to cause more arguments then any other topic. What's more, studies by Citibank have found that money is the leading cause of divorce. But it's not always the lack of money that's the problem: Some couples have more money than they know what to do with, and this can result in a great deal of friction in the relationship.

  2. You fantasize about others besides your spouse. It's happened to plenty of us: we've been jolted awake after dreaming about our favorite movie star in some pretty compromising positions. For the most part, occasional fantasies like these are completely harmless. But if you're constantly picturing someone else's face or body while in bed with your spouse (or can't stop thinking about your life with another person), it could certainly spell trouble. 

  3. You're not having sex. No rule says that you need to be copulating every night of the week (in fact, according to the Sex in America study, as many as 45 percent of married couples get frisky just a few times a month, while only 7 percent make love four or more times a week), but if things have gone completely stale on the physical side of your relationship-and some of the other signs on this list are present-it could signify marital problems.

  4. One or both of you is having an affair. A survey by the National Opinion Research Center at the University of Chicago found that 25 percent of men and 17 percent of women have been unfaithful at some point in their lives. Although some couples end up staying together after the affair for their children's sake, research shows that approximately 65 percent of marriages break up because of adultery. In Taiwan, a study on extramarital affairs identified men married from eight to 16 years as the group at greatest risk of having an affair; they are involved in about 24 percent of all affairs. Not far behind are those who have been married for two to four years. And 16 percent of all affairs happen during the first year of marriage.

  5. You go out of your way to avoid being with each other. There's nothing wrong with wanting a little space in your day. For example, going for a walk by yourself or relaxing in the tub with a good book can do wonders in helping you clear your head after a long day. The trouble comes when you or your spouse start making a conscious effort to be where the other is not-and you begin showing up solo at family gatherings, kids' soccer games, and even the dinner table.