Hmm, a life of unsatisfied sexual need.....yeah, it's a deal breaker. In the end, your lack of fulfilment will ruin the relationship and you'll be some middle aged person trying live out 2 decades worth of sexual gratification. Unless......you can get what you need and him accept it.
PS. Never chain yourself down and only have tried one cock. Yes, you not being fulfilled is the entire reason you're here in the first place.