Slowing down with a boat??

[JeanieJ]

I wont go into too much detail (mostly because I don't remember the small things)

50 NL Party Poker 10 handed

I have pocket ducks (22)

I flop a set with a board of

2 J 9

I check, he bets, I call.
The Turn: comes another 9 (suit unimportant)
I check again, he bets, I raise, he reraises I just call.

I'm not sure what he raised to, and what I reraised to. At this point I was Thinking he may have J9

The river came a 10 and he bet I just called.

Should I have raised the rest of his stack all-in on the river? He had 16 left after his bet on the river. Was it right to slow down when I hit my boat? I'm not too sure If I played this well at all. It doesn't look good to me.

Any and all opinions welcomed.
Thanks in advance! (sorry so short on details)

-Jeanie