You seem to be laboring under the misconception that HIV is limited to homosexuals and that it is somehow related to same-sex marriage. This is wrong on both counts. HIV is not limited to homosexuals. HIV transmission between heterosexuals is orders of magnitude higher than among homosexuals if you look at actual numbers of new cases. Percentage wise it may be higher among homosexuals but that is misleading when the entire population affected by HIV is considered.
HIV transmission should not even be considered in relation to same sex marriage. These are two entirely separate issues. Actually, one might anticipate that HIV transmission between homosexuals would DECREASE if homosexuals were allowed to legally establish long-term monogamous relationships. By legally preventing marriage, promiscuity would be expected to increase thereby increasing the number of sexual contacts and thereby the number of new cases.
I don't think you can. You either has to be single or married to adopt. Just living together is neither. if you are in a samesex relationship and has gone through partnership might be possible though.
Anyone can do anything they want to as long as they truly want it. No, in Islam having a boyfriend/girlfriend type of relationship is not allowed whether your a male or a female and whether the bf/gf is Muslim or not. If you have anymore questions regarding the matter, just ask and I'll be happy to answer them. i gree in islam having a boyfrnd or a grlfrnd is not allowd but today no youngr generation follows it .....so if a muslim girl personlly like a non muslim boy...then it is not allowd in islam.....u cannot marry him unless he accpts islam...:)