Idk how we will ever get married

We've been engaged for a few years and have done zero wedding planning. I don't even know where to begin or how to do any of this and we don't have very much money to begin with. Besides, my fiancé's family and I do not get along. His sister and I absolutely hate each other and he doesn't even have a good relationship with her. I barely speak to his mom or aunts because of all the drama they've caused...its just a long story. How am I supposed to want these kinds of people I don't get along with and have hurt me so badly at my own wedding? Why would I want to share MY/OUR special day with them? I love this man and we've been together for so long but I just don't know how to figure this out 😞