My honest view is that years of insecure attachment stemming from childhood probably can take a really long time to resolve.

I've only been one year into therapy, though. Then other than a secure attachment with T (already difficult as we experience connection and disconnection with T), there's also attachments with various other people in our lives.

I don't keep in touch with people too - I push them away without realising or I keep my distance, or I get clingy and they run.

Hence, offline, I'm super isolated without any friends.

Honestly, I think it will take a lot of consistent , real world "corrective emotional experiences" with various people to be able to develop "earned secure attachment".

Just my opinion though.