SouthPaw41L hit it dead on.
Also, you'll find numerous songs out there that it may look like only one person is doing everything, but in reality there is a second guitar playing. Take Guns n Roses for instance.
Play what you can, don't try copying what you see one person doing.
I tried whatching James Taylor, on a PBS special, he did an amazing job, but when I tried to copy what I saw him doing it came out worse than when I was just doing it my way.
Maybe even get away from the song that you are trying to learn for a few days and try a different song, it'll give you mind a chance to relax from the song. As in anything, if you consentrate to long on being stuck, then you'll stay stuck, just rest awhile.
If you're not happy with what you have...
Then you'll never be happy with what you get...