help with my crush πŸ™„πŸ˜©πŸ˜°πŸ˜°

Delia
So I met him at work, he's a total nerd / sweetie pie and I have formed the BIGGEST crush on him 😩 
It's been great working together but he's getting transferred to another store so I won't see him ever again and I can't let that happen. 
I have NO idea if he is interested in me or dating in general, but we're always talking and laughing and like a lot of the same things...
I need some ideas on how to ask for him number!! Or just ask him out or just how I can show him I'm interested without coming off too strong... 
any suggestions? 
Have you ever asked a guy out? 😰