Warrior
A cancer diagnosis is a funny thing. A lot of people, maybe most, seem clueless in dealing with a current friend, associate or relative who is diagnosed. Cancer is a scary thing - Cancer is a word no one wants to hear.
People around yo have no idea if you are minimally impacted or perhaps going to die tomorrow. No one wants to say anything that might upset you. So they may move away just a bit, giving you however space you might need.
You may need to take the lead in reestablishing normal interpersonal relationships. Casually restore the prior norm "lets grab coffee on Wednesday", or "golf on Saturday" - whatever is the norm. Let people see that you are still you. Dissolve any mystery, briefly explain as seems right, get back on track.
Cancer can be the BIG elephant in the room. Tame the beast.
Have plans been made to deal with the necrotic bladder tissue, or is it a "wait and watch" issue?
As Bob Dylan reminded us, "It's life ma, just that".
Make it the best it can be.
Best
Jack