Like the other posters, I agree that his masturbation is actually not the issue, but that his attitude towards you pleasuring yourself (either with him or without) is the real issue here.
He sounds selfish to me and out of touch with what women want and feel about sex. The way you describe him sounds as if sex is for his pleasure with little consideration for yours.
I guess you have 2 choices. You can buy yourself a vibrator (which I would strongly suggest) and see to your own pleasure. I would let him know that this is what you've done. What's he going to do? Hold his breath until he turns blue?
However, this is not going to solve the problem in the long term...
Or, you can ask him to work with you in rethinking your sexual relationship; it IS possible to reestablish connection and passion - is he willing to partner with you in doing this? Part of this may be masturbating together, using sex toys and acting out gentle fantasies.
It all boils down to whether you and he think the relationship is important enough to do this. Are you both willing to take the next step?