I don't know what basis you are going off of when you say that after 10 months the relationship should be at a point where you should be spending more time together. However, I feel like every relationship is different. Some couples just naturally are close from the get-go because time allows it. However, I know some couples that it took them years to get to that point where they both feel close with each other.
RSNEXTDOOR and MARVELCLIMBER have the right idea in that you should communicate your feelings with your partner. Just don't make it seem like you are coming for his throat. Just calmly make your feelings known to him so you can bring some visibility to your concerns.
LILTANKER also brings up a valid point in that you should be really optimistic and happy with what he already offers you. Some couples don't have the luxury of seeing someone even on a weekly basis, so really take advantage of that. On the weekends that he does come visit, try doing something novel and exciting. Really make those hours memorable. Sometimes it's all about quality over quantity.
And if you really are looking for MORE, try meeting him halfway. How often do you make the effort to go and see him? There are ways to get more out of a relationship without demanding more time. Try making bigger plans over the weekend, so you both have something to look forward to. On the days that you don't see him, invest in some personal time.
It all boils down to how much you want to put into this relationship. If you're not willing to put in the work, then maybe you're looking for something else.
Hope that helped!