Hand 1 - Dont really mind this as its first hand, I feel there was a good chance he is playing AK AJ flush draw or something, i'm not really prepared to give him credit for the Q, normally this increases its bet at some point. Either 1. you lose, he thinks you are a fish and you win it back with interest later 2. You win nice start to table and he knows not to mess.

Hand 2 - Pretty sure you were beaten by the river so I fold it to, but you probably have to re-raise him at some point. There is no point just chasing your 6 outs which may kill the action anyway. Its a gay min-raise pre flop so a re-raise in position may help; I definatly re-raise flop when he bets same gay ammount. If he calls I probably check fold. (but after your raise if he calls he will probably check through the turn giving you a free card)

Hand 3- If he was raising a lot he was probably raising all Ax soooted and maby just Ax pocket pairs sooty connectors in position as well as the normal stuff. How much had you been raising, or re-raising more to the point. Basically would he be able to put you on AA-QQ with the re-raise. If so he def calls your pre flop bet looking for a monster and your flop bet looking for a scare card or weakness to bluff at, which is what his turn bet looks like.

However you say he had been betting into weakness here he is betting into someone showing strength, which sets my alarm bells ringing (also my experience of NL25 was there are few players will bet $8 on air so he probably has SOMETHING and QQ-JJ etc probably bet to you or raise you on flop)....

I think I would fold the turn as well; a call is out as there is no point you chasing 2 outs to make you comefortable with your hand. If you raise even to double his bet you only have $9 in your stack that will go in on the river so may as well push. So its a very good bet from him IMHO. I probably just fold to be honest, there will be better moments to get all your chips in. (that sounds very weak tho, so what do other people think?) Also this is why it is good to re-raise lower pocket pairs sometimes, you hit a set play it the same way, he tries this move.....