Distract me

I have been fighting to stay positive since I was told I had a tumor and might lose my arm, and tho I am hopeful and determined... The problem is still there, not fixed, we are just getting started and I am afraid I might not be able to stay hopeful throughout the whole thing.
Yesterday I was with my friends, in the middle of our conversations I constantly remembered "Oh god... my tumor, I might miss all of this" I push myself to do things that will give me some false sense of "normal", to make me feel like nothing is wrong, everything's alright... but is that right tho? Am I just running from it?
I felt something in me, begging my friends "Help me not be sad, help me not cry, keep making me laugh to take my mind off things"
While also reminding myself "I have got a long road ahead, hold on, just try to enjoy this meanwhile"