Weekends Have Been Hard...

OK - So I have made up an excuse that on Friday's and most Saturday's that it's ok for me to "cheat"... But I seem to take it too far... I'm not being as smart as I should with my cheats nor am I limiting it to ONE day. I start off VERY good on Saturday but by the time I go to bed I have blown it. I don't want to keep doing this anymore. I want to get the will power again to say "no" to over indulging. I want the power to overcome this desire to want to more of something good. This is going to ruin my weight loss efforts. Right now I think I am my own enemy........