Questions to ask a guy you work with on a walk?

So I like this guy at work I've literally only just met him so don't know much about him, he's not married but think he might be seeing someone as overheard him talking about a girl but he didn't seem keen, we work nights and my mum goes to the theatre round the corner and i can't walk on my own in the dark and i knew he parked in town so i goes to say/ask ill need to walk that way so id walk half way with him then walk the rest my own but he offered to take me all the way now i need to know how to get to know him better but i suck at it? I don't like asking guys i like if they have a girlfriend cos i think it looks obvious id like them
Questions to ask a guy you work with on a walk?
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