Hello Blueflames,
Welcome to PC. I hope you can be assured that there are many people here who are very helpful and willing to lend support.

You are not alone.

Are you seeing a Therapist at all? It may not even be a bad idea to bring your family along with you to therapy, perhaps then they may gain some more insight as to why you do what you do and they can then react differently. Talking it out with someone objective can be extremely helpful, at least in my experience.

Also, when I feel invalidated I tend to isolate as well. I hope you can try to be gentle with yourself, not beat yourself up too badly and seek more help professionally. I know when my stuff seems to be affecting those around me sometimes talking about them isn't the best thing. Have you tried writing your parents a letter explaining how you feel and what kind of support you need from them? It could be worth a shot.

I also find that when things set me off or overwhelm me easily it helps if I just disengage, distract and do something else...go for a walk, read a book, help out with a chore or task etc...

Posting here is helpful as well as you can find people who relate to your situation and can offer more advice. So keep doing it. Much Love.