I'm thinking of cutting contact with a friend of mine because I love her and she doesn't feel the same
What do you want from your friend?
I wish she would love me as much as I love her
When love isn't reciprocated, we can feel bad about ourselves. This is no reason to end your relationship with your friend. Let go of your pride and self-pity and see the joy in what you have with her without things being romantic.
I'm going to end this before I can no longer handle the pain.
Honestly, if it's causing you that much pain, it's probably for the best to move on; it's not healthy to pine after someone who doesn't feel the same. I'm sure it's awkward for her at this point, too.