SB is loose regular who could make fairly loose hero-calls, I had about 2.5k hands on him. He 3bets ~18% and 19,2% vsHero, especially vs CO and BTN, vs which his 3bet is 31% and 18% respectively. He fold to 4bet approximately 55. I'd been folding and sometimes passively defending against his PF aggression before that. Even so, I’ve decided to 4bet here, cuz for me it’s relatively easy 4bet for value. I wasn’t expecting him to fold a lot here, also I have to defend my QQ against overcards.

But he's made 5-bet. His TOT 5-bet-range is 6% and I don't know what play would be the best here. Thoughts?

P.S. Sorry for bad english :)