Bottom pair as well as bottom two pair is pretty worhless in this game.


Trips are much worse than having a set (where the pair is in your hand as opposed to on the board). When the board pairs expect to run into full houses and quads.


The bet on the turn is made to try and drop your opponent. At this point there is no low and your opponent has to wonder whether you have been betting a hand like pocket kings or queens. When he calls you have to give him credit for some hand.


I wouldn't bet the river either. You are only likely to get called by hands that beat yours. Your opponent could easily have been playing a hand like A 2 5 Q or A 2 5 K and backed into a weak full house. As Buzz says if he had pocket K or Q you would likely be raised on the turn.


I think your friend played the hand correctly. (But I'm only a student, not an expert.)