Find the courage to speak up when someone hurts me

Ouch …normally Im dumb founded when someone I care about hurts me…Im not sure how to react…I just let it slide and keep the feelings bottled up inside . I dont know why I have a hard time communicating the pain, is it Im embarressed , is it that I dont want to open the flood gate ,am I afraid that by saying something it will generate a negetive responce i just dont want to whine and start a fight. I know if I say something at the moment of impact I will more and likely shed a few tears…so I bite my lip pretend it bounced off then wait to comprehend the situation until im alone. It knocks my equalibrium all out of wack…I walk around feeling quite confused and by not broaching the subject its easy for the individual to continue the pain.