My Little Friend (2011)

Amy is a lesbian artist living in a small New Hampshire town with her historian father when she is reunited with her old high school friend Emily after nearly 10 years apart. Emily is completely unaware of Amy's true sexual orientation and after a few evenings of drinks and some sexual tension leads to a blurred line in Amy and Emily's friendship, which is complicated more by Emily's neurotic boyfriend, Charlie, whom sees Amy as a threat to his relationship with Emily.