What are some tips for sleeping comfortably with long hair?

My hair is getting ridiculously long, and I refuse to cut it! My problem is, when I sleep, my hair gets caught under my arms or my boyfriend lays on it and then when I go to turn my head or move in anyway, it gets pulled. OUCH! And sometimes sleeping with my hair down gets kind of warm during the summer.

The length of my hair is between the middle of my back and my lower back. I’ve tried sleeping with it tied in a pony tail (high and low) and I’ve tried braiding it. Neither way is comfortable for me.

Guys and girls who have long hair, how do you manage your hair at bedtime? What do you do to allow yourself to sleep comfortably without getting it pulled on or sweating because it feels like you’re wearing a scarf?