Sorry to hear this. I can imagine this being in my future as well. I am 23, so I am just reaching the age where I look around and see that, suddenly, everyone my age is getting married. I might get married someday, but it is not really in my plans. I always knew that staying single would make me different, but it didn't really hit home until I got to the age at which being single is no longer the norm. Hopefully, the community I end up living in will have a significant population of unmarried adults. However, even if it does, I have always been awful at arranging casual events or outings. If it is a formal event, where I send out invitations to everyone, I am fine, but if I have to call or text a bunch of people to arrange it, forget it. Most of the "parties" I went to in college were arranged by student organizations I was part of, and the rest were arranged by friends who invited me.
That being said, the only solution that I can see is to find and join an organization or club that has casual social events on a regular basis.
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Your Aspie score: 120 of 200 ; Your neurotypical (non-autistic) score: 90 of 200
You seem to have both Aspie and neurotypical traits
Self-DX: Extreme Introvert, possibly with ADHD-Primarily Inattentive; Official DX: Generalized Anxiety Disorder