No
Yes you can, HIV can be transferred from one to another trough blood or sexual intercourse. If an HIV infected person's blood had to come in contact with somebody else's the transfer of HIV is highly possible.
A HIV negative person can not be a carrier of HIV.
The underling root of HIV is direct sex. When a person is HIV positive and another person is HIV negative and they have direct sex, the HIV moves into the HIV negative person and the HIV is now positive in both of the persons.
yes
No
It is better to be HIV negative than HIV positive. An HIV positive person is infected with HIV.
It would be almost impossible to test negative if a person is HIV positive.
Yes. If the person had a "false negative" on their HIV test (getting a negative result even when the person actually does have HIV), then HIV can be transmitted. Sadly, false negatives are common, especially early in the infection. When in doubt, use condoms so that you are not infected with any STDs.
It is possible to have a false negative HIV test, particuarly early in infection with HIV. If a partner has a true negative HIV test, it's not possible to get HIV from them.
Yes HIV can be transferred via oral and anal sex.
Relief happens if you are HIV negative.
If you are not already infected with HIV, then you cannot get it by touching your own blood. HIV can only be contracted if you touch somebody else's blood who is already infected with the disease. This website gives you a detailed explaination of how HIV can be transferred: http://hivinsite.ucsf.edu/hiv?page=basics-00-05