I'd also suggest finding some new bands that you've never heard of. Try a different genre of music. Think of a style that has a sort of essence or emphasis that you admire that's not typically in your tastes. Find new inspiration, something you didn't know was out there. There are a lot of guitarists that are frequently mentioned here but that's still just the tip of the iceberg. There's so much music out there and to not enjoy as much of it as you can just seems like a waste to me. What it all boils down to is find something you didn't know, learn something. Read, browse, look for things and don't stop until you move up. And don't worry, we all hit that "all my stuff sounds the same anymore" level and it's times like that that really test our dedication. Keep it up and you'll be fine. Or you could always try finding someone to jam with. As of lately I've been jamming with some dude and the ideas he's been unlocking to me have been quite abundant. A teacher is good to practice with, but it doesn't hurt to have someone to play with as well.