easy check/call river.If he shoves river you have to fold because he will show always up with a flush or the nut straight.Also when you bet river you don't give him any chance to bluff you or to call worse so you are either splitting or he is taking it away.Since he can be bluffing alot this spot you have to call and probably face a suck out very often (this doesn't make sense because i was speaking he is bluffing alot

and now he is having only stronger hand but i hope you got my mind).