Help me please!

Casey
Hey guys. I need some help. 
Anyone who has been sexually abused, and has struggled with this, please anything you have that could possibly help me..
There's this guy.. I absolutely adore him. I love everything about him. He treats me well. He is kind, loving, caring, all that.. But today we were hanging out, and we started kissing. Which of course, led to his hands wandering. I was really uncomfortable, but couldn't say anything. I know if I say something, he'll stop. He knows what I've gone through, and he truly does care. 
But why couldn't I just tell him? And why am I so uncomfortable with him touching me? Is this ever going to stop?