Sadly our whole society has been using food in this way for years. They, your family and friends, think it's normal. However now millions of us are starting to find out that way of eating is harmful to many of us.
Few things to do:
Stick with it. In a few months they will all be commenting on how well and slim you look, and how did you do it?
Get a cgm, Libre does a 2 week free trial and then you can show them how much carbs spike you. It can look quite dramatic as it takes you out of safety zone and is a good visual for them to remember. (It's very good motivation for you too)
Keep separate tins and areas in the kitchen. My husband and son are allowed carbs , as long as they are out of sight! They also have to keep out of my low carb goodies. It's an unbreakable rule. !! 2 years in and they are now eating much lower carb as they have gradually learned more and see the good results.
Prepare before you go out, perhaps look at the menu on line and work out choices beforehand. Or take something with you. Alcohol isn't all bad. A small glass of wine topped up with soda, and the second and 3rd glasses being just soda looks socially acceptable
This blog from couple of Australian lady doctors explains more about how to cope going out
"What should I eat at Christmas?" We get this question all the time. Most people are expecting us to give them a food list or a meal plan, but here’s the thing - there is no one plan that suits everyone. You get to decide what works for you, as what works for you may not work for someone else.
www.rlmedicine.com
Keep posting here, lots of good ideas and support
