You have to tell them how you feel, and take responsibility for the way you feel. Don't tell them they MADE you feel this way. Remember while you cant help what you feel, no one can make you feel things. Tell them both why lovemaking was important to you, that you expected it, and when it didn't happen, how you felt.
It's not worth walking! Take the time to breathe, assess, and when you're in a place for it, ask for some time from them to discuss how you feel.