I had a brain aneurysm clipped last year and I'm still having headaches. Shouldn't they be gone?

Have it evaluated. It is certainly possible that some of the headaches may be related to surgical healing. However, there are well known long term sequelae from brain aneurysms-particularly if there was a rupture. Delayed hydrocephalus is one of those where the fluid in the ventricles does not absorb as well. This can easily be evaluated by your physician.
YOU MAY HAVE . Another cause for headaches other than the aneurysm. You need to see your doctor for proper diagnosis please.