I think as long as you're not actively trying to sabotage it you're doing quite well. You might want to let her in on you having trust issues. As females we naturally assume we're the center of the universe and the guy in our life being somewhat distant or closed off makes us think it's something to do with us. We refuse to believe you guys may have thoughts that don't even involve us. Even if we pretend otherwise, it's totally true. You'll find she'll be more patient if you screw up.

Plus, excessive giggling is creepy. It's one of the things we look at as a warning we're probably headed towards being chucked in a large hole and being sprayed down with lotion.