If you feel great just count your blessings and go on.
BUT what your experiencing is atypical and very rare.
Most people have withdrawal effects from SSRIs.
Wow! That's good news for you. Your the first person I have every met that did not get withdrawl effects from stopping Celexa or any antidepressant for that matter.
I agree with Pearlymae, keep on rolling and consider yourself lucky.
I didn't have any real withdrawal symptoms from stopping Celexa either, other than some wild but not scary dreams. The first month off it I felt supercharged with happiness, which seemed to me a bit more happy than what I felt like when on it. Feeling great right after quitting is somewhat normal from what I have read. After that month, life just dropped back to about what it had been before the depression showed up.
You need to continually self monitor to make sure you really are ok without a med, because a second depression gives you 90% chance of chronic problems. So check with a professional if you ever have any doubts about whether you are happy enough.