How do I stop being so jealous?

I'm pretty jealous in general, but more so of a particular friend. She's a thin, blonde girl with a great job making great money and has married a good guy she's been with for the past 6 years. We're both 25. I'm still single, cute but not much else, barely get by on the bills, and I'm in debt (car, school, etc). She was able to leave school debt free and car payment free due to parents who helped her out. I know that in the end none of it matters, that only God matters, but I still want those things and I feel horrible cause I feel so jealous. Any advice? I've brought it up subtly and she said that she has a good friend (me) which I guess is the best way to respond to the question. She's a good person, but I still am jealous...