If you discover that you have contracted HPV and you have had the same partner for a long time, it is most probable that he also has the virus. Your partner may have been infected some time ago or recently and not know about it (since HPV infections usually cause no symptoms at all). It cannot be proven whether you gave him the virus or vice-versa.
We have no laboratory routine techniques to detect HPV antibodies. This is unfortunately the reason that we cannot always know whether someone has a new infection or a recurrence of an old infection.