Every facet of a relationship is valued a different amount by each different person. Your partner could see sex as 1 of 10 things they make their relationship decisions on, and for you it could be 1 of 3, creating an imbalance in perceived importance. Love language tests help with this.

You need to decide if it's what's important to you in your relationship, of there are other avenues like opening the relationship, or if it's something you'll swallow because they check the other 8 of 9 points you have. Only you know, but even then you can't know eithout communicating and asking your partner questions - like if they think they are satisfying you or not