What should i do about paying child support?

Ok so my situation is i was with a girl for like 9 months or so and she got prego. I know i was being stupid but im not totally sure its mine. She is going after me for child support and i know she dosnt need it. She will randomly text me, "oh were going to disney land or i got a new car" and me over here am barely able to pay rent and eat. Nevertheless she relentlessly pursues to go in and out of court to try get all kinds of money for me that i could never afford. I was just wondering what the best way to get out of this is? (Up tight idiot women's rights activists please dont respond with your welfare case stories becuase i really dont wanna here it)