Lying to Mom

I feel terrible. Absolutely awful. Mom's always been there for me, no matter what stupid thing I did. She paid for my college, even though it stretched her thin. She helped me move apartments, like, five times. She even pretended to like my awful ex-boyfriend, just to be supportive.

And what did I do? I lied to her about the money. She lent me two grand to fix my car, and I told her I got it done. But I didn't. I used it to go on a trip with friends. The car's still busted, and now Mom thinks I'm responsible. I just… I wanted to have fun for once. I'm so ashamed. I don't know how to tell her the truth without completely crushing her. I'm such a screw-up.