I hosted a NY party once. I told a bunch of people at work, and random folks I met briefly. Told my neighbors. Said people can bring others. It was a huge turn out of like 15-25 people. The extroverts tend to go to 2-3 parties and bounce around. The introverts tend to go out of social pressure.
Being a host isn't my thing. But NY parties is definitely the easiest party to create and get people to come.
Also assuming you don't live in a cabin in the woods. And you promise food and drinks.
I can only imagine the seething in the comments. Not only do people hate blogposting but especially when it's a generic story about getting an attractive gf with 0 work.
Edit: but you've done well. Make sure you are both sensitive to boundaries and working together to make sure you at least always have some sense of how you're both feeling and where the rough edges end up