<human>: Throwaway.

Wife and I have been married for five years. Back on the 4th of July weekend, I gave a ride to one of my coworkers. My wife had asked me during conversation what I was doing, I brushed it off and hid the fact I was with a female coworker. NOTE: the reason I lied in the first place was because there was literally NOTHING going on between me and my coworker except a professional relationship, but explaining to my wife seemed like a big deal at the time (she gets kind of jealous and I was a douchebag once upon a time). 

I had no reason to lie...yet I did. Fast forward to last week, she confronted me about my lie and assumes there must be "more" because I lied. She's been suspecting me for months, and I had no idea. I'm an honest guy, and I feel honesty is the best policy, but I fucked up and lied for no reason. I ended up saying more lies to get myself out of the first lie until she had enough, I told her the true story. She won't believe me. 

I've been faithful my entire marriage and even as a couple. I said one small lie that I didn't think twice about and now my marriage has fallen to shit because she can't trust me anymore. What do I do? What can I do? Any help will be appreciated..

Give me a shortened version of the text
<bot>: told a lie and hid the fact I was with a female when I didn't have to. Wife assumes I'm cheating. HELP