1.) i woulda put all my chips in before the 
river. the chance he has something that beats 
top pair after 7 cards isnt bad. i would probably have pushed on the 
turn if i decided i was going to tie myself into the hand. however, i would probably have slowed down and checked the 
turn. not a terrible play but you do realize after 7 cards you have 
one pair on a 
straight board. the guy was an absolute moron though.
2.) 
two pair vs 
set, youll probably lose money every time. but something to think about...calling doesnt necessarily indicate weakness. it also represents strength. it says 'you cant 
push me out of this hand, i belong in here just as much as you.' i would have bet 
two pair the same but once again, getting married to 
one pair is never a good idea.
3.) you have a very weak hand here. what hand is going to 
call you that you have beat? only hands that will 
call are ones with a 
Q or ones with an A. i say you are either looking to tie or lose this pot. i would 
check/
fold this one if ever given a sign of strength and since none was given id be happy to see a free 
showdown.
i agree with you that players this 
passive are annoying to play with. just make value bets (not all in after 7 cards with a 
pair) when you think youre 
ahead and youll be fine. youre not a terrible player by any means.