villian is 25/20 over 7k hands

3bet 10.1%   3bet from btn 8.1%

my view on villian is that he on the weaker side.however,looking at my HEM,i am down to this opponent quite a considerable amount.

he opens 3.5x utg and 3x from other postions(which is very outdated)

now in this hand he 3bets smallish(for him)

http://weaktight.com/6561171

im mainly concerned with the river play,i honeslty just felt like i was closing my eyes and clicking ''all in''

as you can see my river bet is a full bi.so really not sure what the best line is.

1:if i check river im worried i dont get value from worse

2:if i bet river im worried i only get called by better.

3:if i decide to bet the river(maybe $100-$120) is it a bet-fold or a bet/call off

i have alot of questions about this,but can someone plz help me with the best line to take on the river.

we are scared of 99 and some,but very few 9x combos and a high possibilty of kk(in my mind)i mentioned i considered him weak,but he does find a fold with AA/QQ before the river.and obvs worse.

thoughts would be appreciated tx.