3 months on crutches? damn. I had ACL done and I was off crutches 3 weeks after surgery.
I skied twice at like 5 months. Slid around a little at 2.5.
It's a SUPER dumb thing to do, but you are the one who knows what your body feels like, and what you can take. It's really really risky, because it takes 6(ish) months for that to heal strong enough to start using it at full capacity again, plus you don't have as much muscle so not as much support. I wouldn't make a habit of it if I were you. Take it easy.