My gmail is going to my boyfriends phone 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 Recent Activity>Devices.
Click on any device your account should not be associated with and then click Remove.  

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 Revoke Access.

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.