I've had partners in the past where there were sexual issues, and I've learned the hard way that if you sit around waiting for the person to change...good luck. Though it is possible for people to change, you have no control over whether or how that change happens. So the best mindset for you to put yourself in is to think that "this is how this person is. The way things are sexually is how they will continue to be, and can I accept this?" If you decide that yes, you can accept this situation the way it stands, then it would be worth it to commit yourself to the relationship and possibly try other ways around the issue (maybe he could use a dildo instead of his fingers, for example, and that might be more satisfying for you). But if you're waiting for it to one day be "different" the way you want...you might be waiting forever. You might not. But to spend your entire relationship waiting for that "magic day" when everything will be the way you want is not the right way to approach the situation.

I'm not saying that counseling or talking with each other won't be beneficial- of course those things will help a great deal. It just might not be what you expect.

I hope that whatever you decide to do, you will find happiness.