NC for this - but regular poster and somethings are identifying.
DD (18) has been "invited out" by the son of a family friend - I say "invited" because she's not too sure if it's a date or just platonic (her words).
The man is 27 and we've known him since he was about 8 - so he's not a stranger. DD has known him (in that he's always been around) since she can remember. He's a nice guy - I don't have any qualms about him.
She's now at university in his home town (the town he went to uni at as well) - he's a graduate with a good job and has been living there since he moved away nearly ten years ago. AFAIK he has had one serious girlfriend (lived together in rented accommodation for about 3 years) but nothing for a few years (know his parents well but not massively well).
Since DD started uni she's seen him about twice in their city (bumped into rather than arranging something) and about 3/4 times in their "home town" - we know 27 year old's parents and socialise occasionally (Christmas, BBQs etc...)
DD isn't sure whether he is just being friendly as she's fairly new to the city or whether he is interested in her. She likes him but isn't sure whether this is platonic or not.
So AIBU to ask (on behalf of DD) - is this odd or a normal thing to happen? She feels that because he's known her (platonically) since she was so young that it's "wrong" - I can't decide either way. I think she wants to give it a go and knows it's not just a friendly gesture but is unsure as to the ethics of the situation.