In limit, I wouldn't worry so much about trying to bet and raise more to bring that post flop aggression factor up. I think the problem here is that you CALL too much. Calling lowers your aggression factor.

And yeah, you should stop playing so many hands especially when all the other players are so loose. Just stop calling so much. That's all you have to work on for now. You'll get tighter and your aggression factor will go up.