Your case just sounds like a classic case of not knowing where to put all of your excess energy. If you're the type of person that puts 110% into everything you do, that's actually an amazing quality. Channeling that energy into something like exercise, the same way you did for ballet, would not only give you the killer bod of your dreams but it'll help you replace some of your unhealthy addictions with something productive. Or maybe you can start a new hobby like painting or sculpting, playing a new instrument, writing, or even start dancing again! Those are just a couple of ideas.