Get used to is sth when you are still having problem with it and u havent been used to it for exp:I still didn't get used to driving in London , you go to London and u are new there its just 2 month say get used to +gerund but after a long time for instance 1 year u say be used to +gerund exp:to day I am used to driving in London after 1 year
If you are used to something, you are accustomed to it – you don’t find it unusual.but if you get used to sth you are becoming accustomed to it