Can celexa (citalopram) make it hard for you to wake up?

Yes. Yes. Celexa, known generically as citalopram is an ssri and does have a common adverse effect of somnolence. Not all ssris have the same side effect profile, however, and you may find relief with another drug in this class of antidepressants.
Celexa (citalopram) This is dose dependent or occurs when increasing or lowering the dose. Best to consult your doctor before making any changes.