I Recently Had Knee Surgery To Repair A Torn Patellar

I recently had knee surgery to repair a torn patellar tendon. I have been going to PT and every religiously doing the exercises they give me. I am now 7 weeks post op and still cannot bend my knee more than 70%. One side of my knee is very hard. Am concerned about having a frozen knee for the rest of my life therefore inhibiting all activities that I enjoy. Any suggestions?