Everytime I delete one off my phone, it deletes off my macbook also.
Do you have iCloud Photo Library enabled, both on your iPhone and your Mac? Then you are syncing the library on your Mac and your iPhone in iCloud. all photos are stored in iCloud, any adjustments you do will sync to iCloud, and then the changes will be synced to all devices, so your Photos library will look exactly alike on all devices.
You must not delete any photo you want to keep on any of your devices, if you are using iCloud Photo Library. To save storage on your iPhone enable "Optimize Storage". Then the photos on your iPhone will be reduced in file size , but you need an internet connection if you want to see the full versions.
If you want less photos on your iPhone than on your Mac, don't use iCloud Photo Library. Enable only "My Photo Stream" to transfer the photos from your iPhone to your Mac or use a USB connection. My Photo Stream is more economic, anyway., because it is free. iCloud Photo Library uses the paid iCloud Storage, and only 5GB are free. If your photos need more storage, you will need a paid subscription.
See these support pages: iCloud Photo Library FAQ
and: iCloud: Get help using My Photo Stream
If you want to switch iCloud Photo Library off, be sure to disable "Optimize Storage" before you do that. Wait for the full versions to download again from iCloud.