Scammers may pose using fake pictures and claiming to be from New Zealand or working overseas.Successful scammers are good at grooming you; they ask lots of questions about what you want in your life.

Depression can cause the person to withdraw completely from everything -- and everyone -- around him or her.

"If you're a partner with someone, it's very frustrating," Haltzman says.

Scammers or fraudsters may be on dating sites and social networks setting up fake profiles.

"The person, particularly if untreated, may be prone to changes in their mood, their personality, and their interactions that can threaten the consistency that is the framework of a relationship." He adds that not everyone with bipolar disorder experiences the distinct mood phases of mania and depression.

But when those episodes do occur they can wreak havoc on a relationship.

During the manic phase, a person can lose his or her sense of judgment.

That means spending money recklessly, becoming promiscuous, engaging in risky behaviors like drug and alcohol abuse, and even getting into trouble with the law.

When people get into a relationship, they're looking for stability, says Scott Haltzman, MD.

Haltzman is clinical assistant professor in the Brown University department of psychiatry and human behavior.

He's also medical director of NRI Community Services in Woonsocket, R. and author of The Secrets of Happily Married Men and The Secrets of Happily Married Women.

He tells Web MD that bipolar disorder can seriously complicate a relationship.