<human>: Condense the text into a few key points

I had a big crush on this girl 6 months ago. The environment was such that it would have been a bit inappropriate to make a move. But that time passed and still I never really did anything.

I kind of want to tell her that I really liked her. I would bet money on her not being interested - the window of opportunity is closed, we don't really talk anymore, and it's likely she was never interested in me in the first place - but I just feel so out of character and angry at myself for not at least crashing and burning.

Is this a creepy, weird thing to do? 6 months down the line to just blurt something out (probably on facebook as I lost her number)? Honestly it's probably more about me than her, but having this "what if?" about it rubs me the wrong way. It's not who I am and I hold myself to a higher standard than to be the guy who felt something but never did anything.
<bot>: Regret not making a move months ago, haven't communicated much since, should I do it even though it's kind of weird and will almost definitely fail?