>>723349486
Honestly in my experience that part is completely RNG. You and the perfect someone could be at the same con and just due to building size, never run into eachother throughout a weekend. You can increase your chances going to room parties, knowing where people hangout, but alot of it is random and hoping you meet someone cool.
I met my Venti cosplaying bf randomly outside anime expo at night heading back to the marriot hotel, and we somehow clicked enough to keep talking after the con and things just snowballed