JT8
Sorry to hear about the aptitudes. It's happened to all of us, and that includes me as well. I failed the BA final board twice before being third time lucky. As other pruners have said get feedback and try and work on those areas. The one year gap before you can apply again does go by quickly. The best thing i can advise is for you to gain some valuable work experience (doesn't have to be aviation related), so when you apply again, the key skills BA are looking for in the final board would have developed so much more.
And whatever you do, don't give up hope. A very small % actually get in first time around.