@PAWestie,
PAWestie wrote: There are plenty of younger girls at work he could have went after.
you don't know that he hasn't
~~~
you're interested in a man who is several social generations younger than you are. sexual hookups mean different things for different people - especially when there is a 19 (not 28) year age difference.
if you want to have more than a sexual relationship with him, you're going to have to try to talk to him directly about it though he may be more comfortable 'discussing' this by text. find out if he's interested in dating you or just interested in you on a random sexual basis.
he may be annoyed by your attempt to turn this into more than a hook-up. make sure you're prepared.