How can I cope with my husbands constant lying?

I am so depressed, and I feel like I am going crazy. I have caught my husband in loads of lies. He's actually made up ex-girlfriends, and friends, even telling their names, where they live, where they work, what they looked like, and how he knew them...makes up stories about places he's been, restaurants he's gone too, etc...After I catch him in lies he always swears he won't lie again, but there is always more lying...I know his lies are minor but I feel like, if he'll lie to me about things that don't matter, maybe he'll lie to me about big things as well...why does he do this? I asked him to see a therapist but he refuses, saying that it's not necessary. What can I do??!

get him to a therapist.... he may not think it is needed... maybe he just doesnt see the severity of the problem, yet.

Habitual lying is also a part of my husband's personality. I used to think I was alone with a person who is socially introverted, and when his lie brought up, he claims it is my fault that he has to lie. It is frustrating at best. However, I am reading more about liars. It is truly a disorder and a compulsive liar needs outside help to get better. Linda