Changes over time

Do people find that the way other people see you changes with time?
I am in my 50s, self-identify as autistic and am on a 3 yr waiting list for a formal diagnosis. Over the last few years, those close to me have commented that I have changed and am no longer a nice person to be around, especially in regards to being blunt in conversations and too self-focused.
This is now having an impact on relationships both in the home and within my work.  I'd love to reverse these changes but only realise I have 'overstepped the mark' after the conversation has finished and the damage done.