I licked my hand to sorta kiss a girl I had a crush on
Why would you want to do something gross like that?
I thought it would show affection.
It's great you have a crush now, but there are better ways to go about expressing your affection. What you're doing is weird and gross, and if people find out you might become an outcast.
Why are you trying to ruin my social life?
Well your awkwardness might ruin that for you. If you like her and she likes you you could try holding hands first or hugging. If you act strange people will treat you that way.