How can someone you've never been in a relationship with

Today I went to the chip shop just as it was closing, the woman behind the counter was a small, chubby, very pretty, Indian woman, beautifully curved and about 40 years old. 'I've got sausage and a fish left,' she said.
'It's ok,' I answered, 'I'm training later I can only have chips. Although I am really hungry.'
'Have the fish then.'
'No, it's ok, I can't eat too much before training.'
She loaded my paper up with chips, then looked at me again, 'I'm giving you the sausage.'

I'm in love but won't be going back as it's so far out of my way and she is of course married.

[Sorry if this isn't very understandable it's a very British story!]

Rejection, leading-on/toying-with, destroying their own lives and refusing opportunities for self-improvement, etc. It's probably not possible to list all the options available for this.

They can be married or dating when you thought they weren’t so then chances are now zero