I'm Thirteen And Started Judo Last Summer. I Twisted My

I'm thirteen and started judo last summer. I twisted my knee after being thrown and I got therapy for it and went back. Then I twisted it again because I went back a bit too soon. I loved the sport but I don't know if it's safe to go back. It's. even a year now and I've been treated and I've regained my strength, however people are telling me not to go back because I have fragile knees but that's not true i don't think at least. Am I able to go back or do you suggest I quit a sport I love for my greater good?