vteg-You are not at all alone. So welcome! You'll find tons and tons of people on this site, myself included, who have (or now had) similar behavoirs.
I always lied about what I ate, I would even sometimes lie and tell people I worked out when I didn't. Eat normally in front of people then go home and binge alone--check!
Anyway, I imagine you'll find tons of encouragment here, and if you feel the urge to binge, post a message saying it, and that sometimes helps me.
Good luck! You can do it!