I was on antidepressants for a short period, and they definately hyped me up for the first week or so, it may just be that.
But if you do have BP, good luck to you mate, it won't change who you are, however other peoples opinions of you may change.
Be aware that your bank account, criminal record and reputation can rapidly change for the worse if you felt like having a bit of fun ("a good idea at the time" sort-of thing).
But on the plus side, you may find yourself more creative, intelligent and productive than the average person