How bad is this flop raise?

[thesharpie]

5 handed prima 1/2

CO posted a blind

I open in MP with QTo, unknown CO calls, LAGgy BB calls

6SB Flop comes ATJr

BB bets, I raise, CO coldcalls, BB 3 bets, both call

7.5BB Turn pairs J

BB bets, both call

9.5BB River blank

BB bets, I call


Read on BB. He open raised in MP when he first sat down after posting a blind with J3s, then led 3 bet into me heads up on a paired board with a flush draw. He also raised a stop and go every street with queen high. Let's just say he's capable of betting the flop with a gutshot... I think I should fold the river, and I'm not sure about the flop raise. There aren't really overcards that can hurt me, and I'm probably not folding CO if he has a king, and BB is very likely to 3 bet me.