Don't beat yourself up, something will click and get you going again. I'm the same way, and I have a '59 Bel Air 2-door post project I'm in the middle of - that I haven't touched in well over a year. Life got in the way, a few injuries got in the way, and plain old laziness/procrastination/apathy got in the way. If I'm being honest, instead of sitting here typing this, I should be out there doing SOMETHING! But I can't get going either. But I know I will, and you will too. Don't get discouraged, allow yourself some grace and get after it when you're ready. These things are supposed to be fun, so don't force yourself if your heart isn't in it right now.