Agreed venting is ok.
I personally had no problem telling people I had cancer, but I shared my information with only a few. Like when I had drs appointments etc. that way people didn't constantly pester me. Family knew. And when I had info I would just pass it on. But usually I would just say I'm okay... I have to - go for surgery - go for rads - etc... but that's it.

People do mean well and while cancer is what it is and you HAVE NO CHOICE but to accept that it is part of your life, I chose not to give my life over to it. I did what I had to and then lived my life. So it was part of my life, NOT ALL OF IT. During treatments I walked my dog, shopped, went to movies - actually one day I had two treatments as they'd missed one due to a broken machine and another due to a holiday (easter I think) so instead of letting them tack them on at the end I asked them to double up. So both days I went for my first - went shopping (to console myself) and then went back for a second head cook. I looked horrible and was a drooling mess but I still had fun.

Life is what you make it. Tell those close to you what you want them to know - then tell everyone else the minimum.

take care.