Really....can we just have some peace??

So he still overall looks and acts great. You wouldn't know he has cancer. But unfortunately that isn't all that is going on. I mentioned previously that he seemed to have done something to his leg.....the vet put him on some inflammation medicine and he seemed to be doing better. We went on our camping trip this past week and he seemed to re-injure it. I took him in today to have his stitches removed and the vet thinks that he may have torn or ruptured his ACL...really can he not live out the remainder of his days doing what he loves, running and playing ball??? He is on some meds and if he improves in the next two weeks then it may have been just a tear and he will be able to run in a month or so, but only in a straight line, no more running crazy with the ball or doing figure 8's out in the front yard...our favorite evening activity. Because while a tear can get better, it will always be weak. If it is a rupture then it will not heal on its own and I can't put him thru another surgery, especially given the circumstances. So all I can do is make him as comfortable as possible and do whatever "play" we can. This is just killing me.....