How to remove Google account on Chrome? My boyfriend needed to use my phone to access his email. Since logging in his account remains the default user whenever I open Chrome and Google search. I have tried deleting my device on his account in under active devices. I have tried going into Chrome settings but there is no option to remove the account!
Are you sure that your boyfriend's account is opened only in chrome ?
Well i think it's not.

The problem is not with the chrome if i am getting your problem. 
Here the person adds his account to your Google Services and your device is currently using it as its primary account. So, it is auto logging in as default account in chrome.

If you want to check:
Open Gmail app look for the account signed in already by touching 3 lines on the upper left of the screen, there must be showing your bfs account.

So now, you have to remove this account from your device. Follow these steps:


Open Settings-Account-Google
Now click the account you want to remove and touch 3 dots on the upper right corner of the screen and choose remove account.


It's done.

However, what you have did by removing your device from his 'my activities' tab.
This will only unlink your device from his Google account that means if you will try to sign in it may need to go through verification for signing in next time. As your device is now unknown/new for this particular Google account.