The feeling that you described NearokA it starts in the pit of your stomach. sort of like the feeling one gets before they go on stage for a preformance or a speech. i belive that there is a scientific term for it but i have yet to find this term. you also describe that merely looking at a picture gives you this feeling (me too) can you imagine what it would be like if you were to meet her face to face? Love is also a kind of fear. when it comes to being in love with an unattainable (atleast at this point) woman. this feeling is the thing that drives us men into sending teddy bears with chocolate (no matter how lame it is) to the lovely Miss. Knightley.
thats about all i have to say about that. atleast for the moment.