Pretty privilege exists, and it doesn't happen to me?



I'm the baby of the family and somehow I came out looking ugly, I look like trailer trash. I've struggled with my weight all my life. I had it off in HS, but now I packed it on plus some, I get no dates, no numbers and the only time I'm partially flirted with is online. Even then guys treat me like a hookup, like I'm an easy target cause I'm fat. I've had guys come up to ask me about my sister and even my mom when I thought they were coming up to talk to me. The pounding of the heart leading up to it, and them mentioning that I should tell my sister to go out and dance on the dance floor when we went out dancing. Or her being approached to dance when I've been going there for months upon end. 

It fucking sucks, pretty privilege exists. It's funny when people tell me I have to wait for the right person, lol. Nah, I'm fat there's no right person for me. I got told to stand away from her and MAYBE guys wouldn't be intimidated to come up to me with my sister being in my presence but guys have no issues coming up to her when she's around me. Hmm makes sense doesn't it? Lol. I've cried and cried over this issue. I'm jealous of my sister, she's gotten great men and is married now. People always say how she looks like a model, well she is. She did a magazine, every man is all over her and they are so nice to her. Guys my age too! I know if I ever did find someone it would be out of desperation or a man willing to settle. I'm not pretty and it's funny when people tell me I am. Photos can be deceiving. I know for a fact if I brought a potential guy around he would look and stare like my ex did. My sister is married and has a child now. I'm happy for her. She has a kid and kept her weight down the whole pregnancy and dressed so cute and she's just gorgeous. She worked as a bartender and I can't imagine what kinda comments she got. I got told that no one would come up to me infront of her.
I put our photo on a social forum site and no one chose me. No one. They all chose her. 
I've had family come up to her IN FRONT of me and tell me how beautiful she is. It hurt cause they didn't tell me I was either. Same issues with my friends, I just got cursed lol. I know my place in this world. I always grew up planning out my wedding in my head. But I know it'll never happen. 

Oh well.

I feel so ran down, I'm quiet and boring. I always try to stick up for what is right I don't let people treat me awful. Idk what to do.