Ok, so I wonder if my obsession over "health" is becoming too much.
The way I now eat and the way my mom/family members eat is like night and day. Sometimes I eat those things, but try to eat in moderation. They don't follow moderation. Sometimes I try to encourage them to eat healthier, but they don't follow my suggestions.
Lately I have nightmares that my family members died and I wonder if it is because I am worried that them eating like this is going to make them die? It is weird to explain...
Does anyone else have this problem?
I worry in particular about my mother and my sister. I remember in my one dream I told my mother that she should eat healthier and when asked why I told her so that she would live to see my wedding. (like I ever plan to get married, she is definitely going to have to live to 100 to see that...)
And my sister is also very obese (I don't know her weight, BMI but I am sure she is there and her children are heading there)
She has problems with her knees/and walking. I think some day she might end up in a wheel chair or something...
Does anyone else have this anxiety? Or am I just psycho?

I have the same anxiety. Before I didn't know any better, what anybody else ate never bothered me, but now that I do know better, I see what some of them are eating and it freaks me out. My dad has diabetes and while he's getting better at it, he still doesn't take great care of himself, so I really worry about him. My mom has high cholesterol and I worry that she's only making it (among other things) worse. My grandmother barely eats and when she does, it's crap. So yeah, I understand the anxiety. Unfortunately, until they're ready to make the changes themselves, there's very little we can do.

Wow, I thought there was something wrong with me! Yeah, before I would eat crap and not think twice about it! And when friends told me they worried about my health I thought they were being mean...
But now I feel like I am on that side looking in and now I am worrying about my family's "health" because of what I know about food, health problems, obesity/cancer ect...

I definitely understand that. I lost both of my parents in their 60s. The youngest any of my grandparents died was 79. One of my motivations for losing weight is to live longer than my parents did. It's fairly obvious that I have longevity genes, but they are easily circumvented by the modern American lifestyle -- so I'm trying to live more like my farmer grandparents.

My brother, too, is obese. He tries but has yet to find the key to a healthy weight for himself.

I've kind of reconciled to the idea that I will be the last living member of my nuclear family. The older I get, the less it bothers me. I'm not sure why, but some things just get easier to accept with age and I take those as they come.

I get worried about my family, too! I'm trying to get them to eat better now that I've been trying to eat better too and exercise more! I've convinced my mom to bring whole grain items into the house, and she's slowly getting there. My mom is okay, my dad is overweight and my younger brother is kinda overweight, too. I know that if he continues eating unhealthy foods he'll become obese, too! And I do not want to think about my family suffering like that. My dad's side of the family is pretty big, most of them, and there are definitely heart problems on that side of the family. I definitely want to avoid that and I want my family to be around for a looong time!

Hopefully you can work things out with your family and just take it day by day. Slowly they'll start realizing that you're just trying to help them out and maybe they should give this healthy lifestyle a try. Even if its little things at a time, that will still be a big change!