Unfortunately, you have no rights to his VA benefits and social security payments. Louisiana does not appear to recognize same sex domestic partnerships at this time, and without state legal recognition, no matter how committed or valid your relationship was in other ways, in the eyes of the law, it had no legal standing. Moreover, even if the state itself recognized domestic partnerships--and even if, in that case, you were registered as domestic partners, it's likely the case that federal benefits like the ones you mention would not recognize such a relationship, since the federal government has not done so. The documents you mention are very useful ones within their limits, but do not extend rights outside of their narrow confines. Just as in a mixed sex nonmarried couple, when one passes, the survivor would have no rights to VA beneifts or social security, so is the case for same sex domestic partners.