I fully recognize that my life is pointless and that I have nothing to contribute to either society or even to myself, my life has less point than most anyone's you know. I know on the same basic level that you love your significant other that my life is void of any meaning or value.
However, I don't think small-scale, it's probably one of many reasons why I've never had a serious relationship with anyone or held down a real job. I think in the largest pictures of anyone I know, in the quiet spaces of my head I plan out, in the grossest terms available, ways to solve the largest problems plaguing mankind. And no, I don't mean bigotry or social ills, I mean how to preserve the species in the near and long term. Most of which involve re-accelerating the push into space, colonization of the moon and the development, design and construction of space habitats that are capable of supporting tens of thousands. Then once we tame the space surrounding Earth and perfect our intra-orbital tech to the point where going to the moon is like driving to another city.
I worry about this because I see it happening where I live, vast numbers of immigrants who don't bother to learn the language or even the basic laws. The ones I've met are decent folk, but they're not making much attempt to integrate into the existing culture.