Committed (2005)

Nate (Josh Cooke) and Marni (Jennifer Finnigan) are complete opposites; Nate's comes from a long line of geniuses who all eventually go insane. Then there's Marni, an occupational therapist and everlasting optimist. Somehow, they meet and ironically find a connection that could become love, if they allow themselves to let it happen! Also, there's a dying clown living in the closet.