While I am male (which probably makes the situation different, but whatever), I always miss my hair when I cut it short and end up growing it back out (which is the great part about hair--it grows back).

Anyway, if you really want to cut your hair short, go for it. Short hair can be just as attractive as long hair. I'm pretty terrible at visualizing changes to peoples' appearance, so I can't really fit you with long hair, but I definitely think the second image you posted in the initial post is a better cut.

Do whatever you want. I always get crap from my friends when I cut my hair (the girls threatened to hurt me), but I do it anyway because, ultimately, it is my hair to do with as I wish. If you really want to cut your hair, don't let people here deter you. If you decide you don't like it, you don't have to keep it that way forever. =D

(SPOILER)Shoulder-length-ish hair is hawt.