I got a new iPhone 8 and now all the text mes ssages and messenger I get also go to my husbands phone

on your phone, go to settings -> messages -> send and receive

there you can modify the address where you can receive messages and reply from.

if under settings and the first item is not your name but your husbands, then you need ether create a new Apple ID, or just log out and log in with yours.

Sign out of iCloud on your iPhone, iPad, iPod touch, Apple TV, or Mac - Apple Support

Stop sharing an Apple ID, each user needs their own. You can use Family Sharing if you want to share certain things, but you'll need your own ID and set your iPhone (or his) with this new ID.

Use different AppleIDs. They are not meant to be shared.