Something that could cause someone to use social media may be the excitement of being in contact with different people around the world, or seeing funny memes, or videos, but cyber bullying can cause many to become depressed, people can be ruthless and bully one for their appearance, race, sexual orientation, religion, financial state, clothes, disabilities, etc.
Yes people can get HIV without having full blown aids
Symptoms may worsen, and the illness may progress. This could result in a less positive outcome for the patient; example: longer recovery process, terminal/chronic illness, or even longer term, death.
The answer is family therapists. Hope this helps :)