The Sterile Cuckoo (1969)

Two students at neighboring colleges get swept up in first love. Pookie Adams, a kooky misfit with no family or friends, clings to the quiet and studious Jerry, who has the ability to make a choice of living in Pookie's private world or be accepted by the society that Pookie rejects. Unwittingly, it is through their awkward relationship that Pookie prepares Jerry for the world of "weirdos" that she doesn't fit into.