Why would you be important? More to the point, why does someone have to be important to be invited?
I don't know many people in the city I moved to this year. Everyone I meet who is mildly interesting, I get their email and start inviting them to events and parties. Not many people respond and fewer reciprocate, but I'm planning to live here a while. If it takes me 10 years to make 10 good friends, all that effort will be worthwhile.
IF someone asks (that I know in meat-space) I can articulate things I'm interested in (In more detail than: food, social viewing of media / culture exchange, maybe light board games; in that order of priority).
If I offer something a couple of times and No is always the answer, the message I receive is: I am not important to them.
If I'm also not offered things that I would reasonably enjoy doing or trying occasionally, the message I receive is: I am not important to them.
The message I've found most of my adult life: I am not important. (To anyone, except work, and they'd like me on their terms not mine.)