13 years is nothing I love well I have a crush on a man 18 years older than me. So back to your problem this might seem a bit odd but could you leave him a note or if you two go to lunch at the same time ask him to join you. I would try to find out if he has a wife and family so if you two wanted things to go further you would know before hand if its was possible. Other than that go for it unless you ask you never know. If you want any further thoughts on it send me a message via mail.
He likes you and the age difference is making him reluctant to risk rejection. You didn't mention it but do you know for a fact he's not married or involved with someone? If not suggest lunch or a drink after work. Sadly, with the age difference he doesn't want to look super foolish taking the next step so a bit of that burden falls on you. Make it a low key invitation, just lunch or coffee or something. Good luck.
just ask him why don't people talk anymore
Age does not matter, but it sounds like he maybe married and ooking for fun or just flirting. Ask him to lunch and find out.
Dude, if he truly did, believe me you would know.