I wouldn't raise preflop. you wouldn't push anyone out unless MP capped which indicates you are probably way behind. Maybe this is too weak, but I would bet fold the flop: If MP is drawing, he's probably doing it with a better diamond, and if he has a pair it's probably not 8s or 7s or 5s. Turn is good; good sign that MP checked through, must be looking for a diamond. River, I wouldn't check raise; a worse hand than you will check through and a better hand will cost you more. bet call or check call; I wouldn't fold if I had stuck through to see the river because of the chance your opponents will have to play the board.