Search Results: guy not returning calls

So this guy I work with 31 myself 23 (yes I know age gap but I don't mind). I met him at orientation in January when we started our nursing job together. During orientation we got to talking and he offered to drive me home one day (even though he doesn't live near me) and he picked me up on his way the one day to our 7am start (my house is sorta on the way) but I really appreciated it. He had asked the one other day If I needed a ride but I was meeting a friend so I politely declined. We have each other's numbers and he texted me asking for a shift swap about a month back (even though he doesn't like doing them his words) but he was in a "pickle" so he says and even offered me a 200$ bonous because it was switching from day shift to night shift. I told him I would gladly do the switch no money necessary and he seemed grateful. I told him he could do me a favour in return and he has been more than willing to help me out with a switch in the summer. When I was texting him to try to find a date to switch mine with he called me Kiddo. I'm tempted to reply thanks old man 😉 but I feel as though that might be creepy and I'm not sure if "Kiddo" was meant to be used as friendzone / kid zone or if that's just his way of florting.