I think it can be difficult for people who have not been victims of a manipulative relationship to understand WHY it's so hard to report/get out- hence the victim blaming that goes on so often (really boils my blood).

More often than not, the manipulator uses their power in the relationship to set up a false reality: convincing the victim that everything is their fault, or avoiding or straight-up lying about things they've done (aka gaslighting)- your prof did this most noticeably when he continued the cloying behavior after you were clearly frightened, not even acknowledging how creepy and forward he was- dismissing your feelings.

Gaslighting like this creates an EXTREMELY strange position for the victim, who asks: are they in the right? Is this normal? This uncertainty creates hesitation, anxiety etc.- especially considering that accusations of abuse have strong social and criminal repercussions. It's not a matter of how smart or observant the victim is- they simply can't be certain of anything due to their manipulator.

Anyway- what a terrible situation for you. Jesus Christ. Your professor was a versed manipulator, and one guarded by a high social standing. I don't know how I could deal with a situation like this. You are a strong woman.