We are so sad to learn that your phone is not completing the boot up process, alysongrffn. We want to help get your phone working for you.
We are very sad to say, but at this time a Factory Data Reset would be needed, which will delete everything on your phone. To do this when the phone is not powering on completely, you would need to access the Recovery Mode of the phone. Here is a link to show you how to do this https://www.verizonwireless.com/support/knowledge-base-219240/