Rant for the day

So me and my SO are suppose to be getting married June 9th 2018 my parents and I already decided on a budget and everything over I would take care of. Now my sister let me add hasn't even gotten engaged and just started dating this guy a month ago has decided she wanted to get married 4 months after me so my parents have changed there minds and want me and my SO to pay for everything I don't have that good of a job I'm still in school and my SO can't pay for it all by himself may I add we are still trying to by a house. So we've decided to run off to the courthouse is that bad of me?