me on a date....what's the world coming to

Ok, so this girl that used to come into the bar works at a local Starbucks that I stop into about three times a week. There was some passive flirting...etc. That turned into more flirting...which finally turned into me trading my number for the Double shot venti non-fat gingerbread chai (yeah, my drink is really that complicated....but it's AMAZING...try it and tell me i'm wrong)

So she called...

we went out had a great time...she's really cool...and yes, you could say...I like her. At the end of the night I held back some charm and just kissed her goodnight, and spoke about our next "event"....

Ok, problem...before I gave her my number...before i actually thought we might get together...she asked me my age...and I said 25!!! I dont know why it' just came out...I was hoping she wouldn't remember...but she did...

Any advice on how to tell her without sounding like i'm a creepy liar guy???