Hello, I Ended Up Hyperextending My Knee On Sat. 10/31

Hello,
I ended up hyperextending my knee on Sat. 10/31 playing a rugby game. I was told I have a minor non-displaced TBF. I was told to be non-weight bearing on crutches for the next four weeks. My problem is that crutches are very painful for me and I catch myself being partial-weight bearing on crutches. It doesnt hurt me when I walk partial, but how unsafe is it? Sometimes walking non weight bearing is so painful for me since I am student walking across a large hilly campus. Thanks for your time!