Ligamentous laxity&knee problems..is it ok to lift heavy?

himel13

After suffering with knee pain for a few months and therefore not being able to exercise properly, I finally made it to the doctor yesterday.
First of all, my x-rays showed that I have perfect knees (if only I do say so myself..the doctor just said the x-rays are good :P)
Apparently I have signs of osteoarthritis, but the doctor thinks I am too young to have it. He gave me medicine to help reduce friction in my joints and asked me to wear a knee cap.
Anyhoooo, it turns out I also have ligamentous laxity..which explains why I always sprain my ankle if I try to run and also why my legs sometimes give out on me for no apparent reason. It could also be the reason I throw like a child..I thought I was just bad at sport.
I digress..I asked the doctor if I could lift heavy weights. He looked at me in shock and asked why I would even want to do such a thing (women lifting heavy is something you don't see a lot of in Bangladesh..we have yet to beat the stereotype). He said I should avoid squats and stairs and doesn't think that lifting is the best of ideas for me as it will put pressure on already bad knees.

Now my question: How will I achieve the legs, booty and arms of my dreams unless I am allowed to lift heavy weights? I love strength training and hate cardio. He didn't say I CAN'T lift heavy, but he advised against it. Is there anyone out there who has similar knee problems and can still squat and lift? Any advice?