I want drop a pfa I have on my boyfriend but it was already finalized

Laws go by state.
The term is expunge, and the act is called expunction.
You need to try to apply at your court, but don't expect it to be easy. If it was serious enough to go through the proceedings and be finalized, they expect it to mean something, especially if this was all done at taxpayer's expense. And too many women are sweet-talked by exes who then abuse them all over again.