This will depend both on your own and the other person’s circumstances, needs and character.
But making it clear that you’re there to offer support, not judging, and listening, are often good places to start.
Learning about HIV, its effects and treatment may help you to understand the experiences of someone with HIV, and to be able to discuss their experience or options.
Finding out about other sources of support – both for the person with HIV and yourself – is also likely to be a good idea. There are many organisations that provide information, advice and support around the world.