Because same-sex marriage is a belief among homosexuals, therefore denying same-sex marriage is denying their beliefs.
Alternate Viewpoint:Some organized religions support same-sex marriage and some oppose it. By banning same-sex marriage, the government is preventing some religions from marrying people it wants to marry, while siding with other religions that don't want members of other religions to marry.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...:)