Love / How do I get a shy Polish man to make a move? [9]

Hi I'm English and I've been working a few shifts with a lovely Polish man. It's clear he likes me but he's incredibly shy or unsure of himself (not sure which). I'm not a forward person and don't date much so I really don't want to ask him out first, I'm quite old fashioned and would prefer him to.

Everytime I think he's going to say something about going out he goes as red as a tomato and stutters a lot. Does anyone have any advice? I'm only asking on here because of cultural differences I know he's a man just like any other. Thank you!!