Pocket Pairs in 6 max? What to do with them

I've started to play some 6 max 1/2 limit tables along with my full ring games and have found a ridiculas amount of success (god people are loose in 6 max!).

On pocket pairs (22-77) you can't really call with them for set value so I think the goal is to get them heads up. I've been raising preflop with low pocket pairs and am not sure if it's the right thing to do. If its folded to me in the CO , Button or SB, I think raising is definetly right. But What do I do with 33 UTG? Or 33 in CO with 2 limpers?