I don't think you're near your limit at that bodyweight and height and those numbers. A guy your size shouldn't get stuck till he's at a 150x5x3 squat, with the other lifts proportionate. I also would like to know how you know your bodyfat. In other words, I think you need to eat more and train heavier. The work can be trained around if you are committed, and lots of guys here will tell you how they did it.