Am I ungreatful or something else? via /r/gratitude

When I was younger and would recieve some kind of gift, my reaction is so visiral and my brain is so ✨💕💖💞💫 I'll forget to actually SAY thank you. Like thank you didn't begin to describe how I feel. I think of how grateful I am, and how I wanna repay them, but will forget to /say/ it. I would get in trouble for being ungreatful or told to say thank you, and I would always think "Can't you tell I'm greatful?" and be filled with feelings of guilt. It got to the point where I would feel sad or guilty when receiving gifts and souls say thank you out of obligation more than genuinely being greatful.

I have been officially and unofficially been diagnosed with things like dyslexia and adhd and I know that those two are often accompanied by autism (I do think I have some form of it, but idk), so I don't know if that's a symptom of that or if it's something else. Does anyone know if this is a symptom of autism?