I asked this girl I like to be my Valentine.(kinda)

Nah, fortunately I don't get the jitters or nervous im pretty forward. Don't be embarrased or anything man, some girls like sincere guys who write letters/note since they are nervous ;P

Usually ask a girl I like out, if she tells me no I shrug and never talk to her again.

When I was younger I had this problem though, but I was too scared to even give them a note.

did it look like this???

It turns out she said no but I asked (i actually talked to her) a different prettier girl and she said yea. How did that work out? Lol

Me and my wife still play coy with each other around the holidays like this. I'm actually planning on making her a Valentines card.

Just keep at it man, eventually you'll be able to talk to 'em easy. And trust me, women like a confident man!