how can I disconnect my boyfriend from my gmail. He says he is going to and still has not. He on his way over now and thought I might be able to do something
Go to myaccount.google.com.
Scroll down to
Click on any device your account should not be associated with and then click
Then scroll down to
Connected Apps and Services>
Account Permissions. Click
View All. Select any app or device that should not be accessing your data and click
It's a good idea to go ahead and run though the security check at the top of the accounts page. As others have mentioned, you may want to go ahead and reset your password, as well.
I think your friend has enabled (in your Gmail) email forwarding to his email address. You can easily disable this forwarding, if this happens to be the case, but requires desktop view of Gmail IMO. Google has a guide to enable/disable email forwarding. Click here to see the guide.
Note: Google mostly takes care of its guides and links,and so, I don't think I need to mention those steps here at all.