Am I being selfish?

sorry it's a long story...so me & my fiancé have been together 2 years+. we are both 19 & early on I had a feeling his dad didn't like me. my fiancés sister had a boyfriend & his parents would always go let her see her boyfriend but always limit mine & my fiancés time together even though we were older & had been together longer. well while my boyfriend was at boot camp I found out his parents had been talking a lot of crap about me to his other family & friends that I never got a chance to meet because they didn't like me.they have been telling lies to everyone saying to their family friends that I said I don't like them & don't want to meet them etc. when I'm pretty sure I never said that. & everyone that I don't let my fiancé hang out with any friends when he's the one that decides not to, I am only with him for money even though I'm the one that has had a consistent job our whole relationship, and just all sorts of things that aren't true. his family has since moved states & we had to follow because we couldn't afford a place of our own yet so we are living with family friends but is it selfish of me to not want them at the wedding? I know that's his family but they have been trying to break us up from about 5 months into our relationship making a fake fb account to try & get me to cheat which I didn't. but just all this childish stuff they have been doing I don't want them at the wedding to try & ruin that too. thoughts?