I had to be a scouser for eighteen months once because the first person I met on a course came from liverpool. I started doing his accent and could never find an opportunity to stop.
Why don't you think you can't stop doing a Liverpool accent?
It was a result of believing in your peers.
It is okay to believe in others and want to be like them but you should not act in a way that seems you are mocking them. It is very rude to do so. You should be yourself around them.
Nah. I'm perfect for bait.
It may seem perfect for you, but it will seem disingenuous to someone else as you're only pretending to have an accent that you do not really have and it will end up making you look like a deceitful person in the end, so I suggest you stop doing it and just be yourself.