Falls in love, claims to be a time traveller

So the movie is kinda similar to K-PAX but it’s about a guy that falls in love and moves in with his girlfriend. His not a very appealing looking guy (FYI). He then starts to claim if memory serves me correctly that either he was a time traveller, from another planet or jumped through portals or was an alien (something like that)…so he starts telling his girlfriend these things and she decides to introduce him to her friends or family and they think his crazy. They then decide he must go visit a psychologist (female btw) and he tells her his story and she diagnoses him with some sort of mental illness. Near the end of the movie they show the female psychologist walking and telling someone he is indeed from another planet/alien etc as she is apparently also one of his “KIND”…

Happy Accidents?