Hi Scarlett,
You can try interest groups that gather in one place online to share their geeky, nerdy interest. These can be found in Facebook groups or video game platforms. You could even join social/dating sites such as Meetup.
Meetup has a variety of groups that meet to share a common interest.
So, whether you are looking for a partner to cosplay with, geek out over LOTR with, blabber about science fiction related topics with, or all of that and more, you will find them there.