Ok Dan, you have quoted one scripture where Paul deals with 'loving neighbour. There are usually more than one referring to laws and commandments....why are you missing them, especially those mentioned by Jesus/God Himself ?
You see, hearing Paul only is no different to hearing Moses only....men are not your authority/Savior - GOD IS !
AND the neighbour mentioned in the 10 commands is not the whole law nor the first law. Give this some thought Dan.
Here are the 55 places in the NASB New Testament where "fulfill" occurs. Is there one you'd like to discuss together?
https://www.biblegateway.com/quicksearch/?qs_version=NASB&quicksearch=fulfill&begin=47&end=73