How do shy guys show that they're "in" to you?

If a guy turns away real quick when you look at him. He probobly likes you. I love shy girls I actualy prefer shy girls over any other type of girl.

Their body language will generally show. Like, they will point their body in your direction when sitting, when they enter a room, they look for you, but won't generally go sit right next to you, but they will find a way to keep an eye out for their crush. He's going to want to be the one to do the little things for you, like hold the door open for you, ask you if you need a hand in whatever you're doing, things like that.

In some way (personality wise) the shy guy reminds me of Eric Foreman/ That Seventies Show, and how he acts around girls. He is so confident in his head, but as he gets closer to what he is admiring, the nerves set in, he starts to trip over his words, and isn't as smooth as he wishes he could be. There are lots more examples, this is just the first one that comes to mind.