Well
@Hulda I'm no stranger to shame, and I am sorry you battle it. Even neglect breeds for it, no child has a capacity to blame anyone other than themself for it. I appreciate your kind words, though I don't think it's something to emulate; rather the end consequence of no longer caring. with a dose of not being seen, understood, heard, or existing, really. So, I meet people (or try to) where they are, and then decide how long I stay or what I give or how much I will agree to. Or I have no choice in the matter, other than what I think or feel and how I react. I do try to be generous in the matter, even recognizing their lack of care, or knowing they will stab me in the back, or knowing anything important to me would be an afterthought to them. So I don't care, I see that as wasted, I just accept it because I know it's true from experience.
I think it got to the point I realized only what I thought felt or believed could not be taken from me, and no one has the right or necessity to know what is within my heart. For all of us that is a sacred place.
If it's about insecurity (triggers are different than insecurity), well I have no desire to spend what is hard to earn to look better; and I have triggers for normal things, haircuts, dentists. Truth be known I think companies make a lot of money. And tbh it doesn't seem to affect approachability from MHE. Mind you I have the benefit of not working where image is critical. So, not confidence but I just don't weight it heavily. Perhaps from caring for enough people on their deathbed too? More of an accomplishment to me if they are calm and safe or can have a laugh than what they are looking like. I remember a great woman, support smart, engaged, full of life, super funny saying to me once, "Don't get me wrong, I very much appreciate what you do, and it's not always pleasant. But you have no idea what a gift it is to me to go to bed happy. " That meant a lot to me. And she was a person, many of her family too actually, who did care.
I guess in a nutshell it is the adage, pay no mind to those that don't matter, and those that matter wouldn't mind. I relate strongly to leaving in a heartbeat. There is also the saying, ~For those who understand no explanation is necessary; for those who don't no explanation is possible.
You sound like a sweet, thoughtful, introspective, caring person who is very hard on yourself. You will have a beautiful 'house', with the features you value. Have some fun, and be yourself. (I think Dr. Suess said No one does you better than you.

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