when it comes down to nervousness, its just you being anxious of what will happen..thats why the quicker you just get it done the quicker your anxiety will end, yes im sure your anxiety comes from a fear that you may be rejected(correct me if im wrong of course ), but you WONT know if thats the case unless you get those few sentences out in the open, and in worse case, she isnt interested in you, DONT worry! there are other women out there, AND you will know that this girl isnt the one for you after all, that way you can leave some anxiety aside at last. and as for you being nervous when your near her, that goes back to what i said earlier, you just dont know how/what she feels for you.