Honesty is an absolute principle of mine. It's just a part of who I am, thus I am honest in almost any situation. I tell the truth, even if it hurts, and surprisingly it's one of the things people respect about me. I tell them the truth and I don't cover it up in lies. Some people still get upset of course, but they still appreciate that I give them the straight dope.
I'm not afraid to lie however, but only white lies. And other times I simply don't say anything

But I'm not saying you should tell her everything right now. You shouldn't be an open book, keep some things to yourself.
Oh yeah and a final little dating advice:
Remember; actions speak louder than words. Telling her that you want to walk the path isn't as powerful as walking the path. Besides, you could screw it up by telling her those things. Stay calm and in control mate.