Multiple users with one iTunes account

My husband does not have a computer so he used my iTunes on my Mac. We used my iTunes to save his music and put it onto his new iPhone. In doing this, all of my songs were deleted. Luckily, I have them saved in google drive. Now I want to add my music to my new iPhone. I don’t want his music on his phone, but I also don’t want to delete all of his music. Since we have thousands of songs, I also don’t want to merge them all together and have to sort through what to sync to my phone. Is there a way for us two maintain two separate libraries in my iTunes account and only sync our own library to our own phone?