Its as if she wishes she could just let go of her doubts and enjoy the wonderful hopeful feeling, but she can't help but fear a little. Maybe she's scared of failure, or disappointing someone...the fact that she looks as though she's hiding her heart more than just acknowledging/readying it really makes me think.
Well sometimes I prefer not to reveal too much in words... I like your description, they often match very well, but sometimes I feel shy and it's almost too personal if I also add words to an already "naked" picture... if you see what I mean? I mean I do know I reveal a lot to you haha, but often in emails and not too much in public like here