It's so hard and I do it constantly. My default setting seems to be this currently. Particularly hard in the holidays when everyone else seems to be jetting off or on family days out.
We are at my sister's tomorrow and she will have lovely hampers for my two but she's posting her decked up house and the kids mountains of pressies in the family chat. She is so generous to us and and her and husband work hard. I don't begrudge her having all they have at all but how do I change my mindset?