Most Helpful Guy
Have you told him how you feel? Most likely, he's probably busy with work and life during the week. The fact he's with you on weekends shows he cares enough to devote the only free time he has to you. I understand your position, but you need to go to the horse in this case to get the true story.
Most Helpful Girl
You should probably talk to him about it. He might just be a quiet guy and is not used to talking a lot. My boyfriends were split, half were quite talkative, some wanted to talk more than I did, and the other half, stopped texting for the most part once we started dating. It's a big issue for you since you considered breaking up with him as a result, perhaps you guys could come to a compromise.