sup fitness, i have a question you those who are willing to answer.

Ive noticed that even though I can go as hard as i can in the gym, and no matter what, I don't get sore anymore, ever. Yes i do stretch everything really well before and after I lift. I'm worried that me not getting sore means I'm not tearing muscle, and not tearing muscle means no gains. anyone have a solution, or is this not even really a problem?