Indian beauty,
i don't think 'you want him to have cancer'
but you are panicking which is no use to you or your friend, if his symptoms are as you say he does need to get checked out by a doctor but they may not be anything serious.
You will need to have a positive and supportive attitude with your friend, tell him that you are sure he will be fine and encourage him to see a doctor.
My best friend has just been diagnosed with a very serious cancer, and I am devastated but I haven't let her see that.
All she sees from me is a positive outlook with a few laughs and giggles.
This is what she needs and proves it by telling me so.
So my advice to you is chill out and not look on the dark side, your friend could have something as simple as an infection, and you panicking will only make him feel worse.
Good luck and keep him smiling.
Flame