This Shouldn't Be So Hard...

I am seriously struggling!  I am having intense cravings and have given into some of them.  Why is this so hard for me??  I see all of you who have lost so much weight.  I know that it wasn't easy for any of you.  But, I told myself in the beginning that if you guys could do it...I could too.  But, I am so mad at myself.  I lost weight in the beginning.  But, I have gained 5 lbs back.  I don't want to be fat for the rest of my life.   I am just having a hard time...