My knee hurts weird when i do squats, i'm 28, have had the same problem as long as i remember, and i've never had a knee injury?

Get it checked: I suggest that you get it checked out. Although, this may be a minor thing, like patella tendonitis (inflammation of one of the tendons that hold the knee cap in place), more serious causes may also occur. You may be referred to physical therapy if your exam/xray are negative.

Kneecap irritation: If the pain is anterior it sounds like patellofemoral pain or cartilage wear under kneecap. If it is at the joint line may be meniscus tear. If no pain or clicking or catching in the knee sounds like the former.

Likely knee cap: The most common and likely cause of pain in front of the knee is an irritated or early wear of the knee cap cartilage or the surface cartilage of the thigh bone that it rubs. Other causes could include a plica, patellar tendonitis etc. For starters avoid knee extension machines, deep knee squats, lunges etc. Try therapy, antiinflammatories, ice and sometimes a knee sleeve. See an orthopedist.