How can I talk to my parents who resent me for trying to lose weight?

[CeeCee]

I've been overweight all of my life. I'm guilty of binge eating and noshing on junk food almost everyday. And my parents have been constantly telling me on a daily basis that I need to start taking my health seriously and exercise and eat healthily. They are really in my face about it and encouraging and not afraid to voice their opinions about it. Well I finally realized that I really wanted to lose weight. I'm 22 years old and I have my whole life ahead of me. So I for the past 6 weeks I've taught myself how to cook and I now walk minimum 3 miles a day. I feel amazing. However I've noticed a complete change in my parents attitude. They have completely removed themselves out of this part of my life. Whenever I tell them how far I walked and how good I feel they almost roll their eyes or give a flippant "mhmm" as a reply. The vibes that I'm getting from them is that they almost resent me for making such a positive change in my life. I feel like they're so focused on telling me what to do and "guiding" me to the right direction that when I finally do it, they feel like I'm abandoning them. And it's not that way that all. I'm doing this for my health and I just wish that I had their support and encouragement. But they are really hard to talk to and I don't know how to approach them with this.