Are you sure it's about 'loving everyone'? Sounds hugely misleading.
I understood 'pansexual' as simply being totally genderblind: while bisexual can get attracted by either a male or a female, pansexual can get attraced also by a person of nonbinary gender. Meaning, a pan can fall in love with a person of any possible gender, while bi can fall in love with a male or a female and straight can fall in love with the opposite gender only. Am I wrong? Because if it's about being polygamous then I see I'm not pan while I believed I am... If I'm strictly monogamous can I or can't I be pan, could someone tell me?