I was thinking the same thing. Sex therapy might be an option.
But, yonique, you can't go on and on living a lie. You should be frank with him. Just sit him down and tell him the whole thing and why you felt it necessary to fake orgasms with him. It's not as if you didn't have a compelling reason to. You didn't do it for selfish or indifferent reasons. From the way you describe him I would think he'd be very understanding and eager to help you. Give him the chance to be the one who breaks through.