Blinds1-200/25 effective stacks 6800, villain covers. Been a table about an hour and villain has been active but not overly so, though my sample size is small. Villain opens mp1 to 500 folds to me in bb with K10s, I call. Flop QJ10 rainbow he leads for 800, I???
This is one of those spots where I'm really unsure best play and I hate them all. I could flat but I never get paid if I hit my straight draw since four to a pretty obvious straight is on board, plus if i miss i have to call a large bet on the turn, again without much in the way of implied odds. I could raise, and i likely have some fold equity, but then im committed and not I great shape against his get it in range, though my equity is prob about 33%ish. Finally, I'm not a pussy, so I don't want to fold

so what do I do?