Advice and help fill comments please !!

Hey guys, I'm getting married in June of 2018. I really plan to loose weight before I get married. I was looking through old photos and I saw how skinny I was four years ago. I really want to go back to where I was but it's just become a really big struggle. I have no friends and no one to help me with exercises or motivation (besides my fiancé but he loses weight so fast and i struggle a lot). I have pcos and I'm about 240lbs right now. Four years ago I was 180lbs. My goal is to be 150-160. But I'll settle for 180 for now. I need help and advice. I've done a lot of things and I have not seen any success. I can't afford a membership. Me and my fiancé are struggling with money as he got laid off. So we don't have a lot of money to even buy food, my grama has been helping us. Really embarrassing, we are working on getting our things together there but I've just become very depressed in the way I look nothing fits me and therefore I wear the same things all the time. I don't take care of myself that well like I used to because I've been hating myself. I really need help and motivation. Maybe someone can help me. I had a talk with myself and I really am ready to loose this weight and become who I want to be. I want a different life within a year. I know it's possible and I want to start now. Here's some pictures

This is me three months ago

And these are me about 4 years ago. Big difference. I don't take pictures anymore 😕😭