Waist Worries Despite Substantial Weight Loss

Hi guys,

Over the past couple of years, through changing my diet and doing more cardio, I've lost around 93lbs and gone from wearing XXL t-shirts and 42 inch jeans to medium t-shirts and 34 inch jeans. However I'm worried that I'm not doing things correctly as I'm still carrying plenty of chub around my middle.

I'm a 6ft bloke and weigh 175lbs - which puts me at a 'healthy weight' albeit on the flawed BMI scale. But my waist is still at about 35 inches at it's biggest, which strikes me as wrong for my weight.

Assuming that is a problem, what's the best way I can address that? Carry on with the cardio and watch nutrition as usual or hit the weights?

Thanks for your help in advance, sorry if the questions are ridiculous!