I didn't know there are different types of cancers
Yes, unfortunately there is. Is there someone you know with a type of cancer?
My friend is currently suffering with cancer
Your friend is lucky to have you. You can try to be with them at any time you can and help them out. They would appreciate it.
I didn't say I never cared about them. Do you care about your friends?
I do care about my friends, it is a natural thing to do. You will be a good friend to your cancer riddled friend, and remember cancer isn't always a death sentence.