how to become a social recluse 101: miss a couple of these facebook events, start getting known as an awkward anti-social person because you went to someone's launch event but not to their birthday party(coz bday invites only go out on facebook,no email or other discussion except maybe a text asking you where you are day of,hour of when you can't re-schedule another commitment)

Congrats, now you don't get invited to any of that person's events. Repeat until you only goto close friends events(who also start excluding you from invites because of accidental snubs)