Maybe HE has things going on in his life, other than spending hours texting.
I was texting a shy guy for almost four hours, he was really engaging too! He even said it was nice talking with me! But I texted him the other day and he never replied, he usually always replies. Does that mean he isn't into me?
Maybe he is busy. Maybe his phone is dead.
Judging by your questions, I would say you are not mature enough for a relationship. I would just let it and him go, and refocus all the time and energy you are putting into all this and put it into your studies.
Purple Rose, believe it or not, he won't have the time to text you 4 hours every time you want to chat. He's got other things going on in his life that take time. If he still lives at home, there is family that he is interacting with. Perhaps his mom wasn't all that thrilled when she found out he was texting so much with one girl and asked him to cool it. You don't know unless you ask him about it.
Asking questions here is fine, unless they are the same question over and over again. That is definitely not fine. It will lead to the mods deleting the questions if they are repetitive in nature.
If you need validation, that's what girlfriends / friends are for. As in any friendship / relationship that you have, there is bound to be miscommunication leading someone to feel misunderstood. If something is not clear, ASK THEM. We don't know either one of the parties involved - we can only GUESS at what's going on. That's why you need to communicate with him.