why we choose to live without purpose

I am a recently injured adult, 27, who obtained an ankle sprain, followed by a hamstring work injury, followed by an unknown ailment to my other ankle. I have been rehabbing for 3 months, with no end in sight, except to leave this predicament through alternative means. My doctors have to take an MRI of my new injury and I am still rehabbing my other two injuries. I’m taking two days off PT because my Achilles is hurting.
My history is that I have attempted suicide 3 times, without succeeding. Two times after my longterm ex’s broke up with me and once while injured in college. I’ve tried to deal with my depression for the last three months by seeing a therapist, talking to my family network, friends and finding alternative hobbies such as reading and playing guitar to fill my time. I am a fulltime graduate student, which adds further stress. Running used to be my means of stress relief, but I haven’t been able to do that for 3 months. Starting to think there is no other way, but out.