Here's what's not wrong with you

 “You want to work out everyday but just can't stay motivated. Here's what's not wrong with you.”

You are not just one person. No, you don't have split personalities, but you certainly have different desires at different times. Sometimes you're bummed out, sad, annoyed, or just plain tired. You may not want to work out on those days. Cut yourself some slack. You're just like everyone else. Just make a point to work out when those feelings end. If you are following your fitness plan (the one you decided works for you) more days than not, don't worry so much. That said, also remember that you are the one that wants to get healthy and fit, which means you have to do the work to make that happen. You may need to take control if you continue to slack off. Re-assess your goals, address obstacles, and remember you never regret working out and eating right...but you do when you skip those things. It's up to you...but you DO have what it takes to make it happen.