Have you tried contacting his family or some of his closest friends? Because there might be a possibility that something bad happened to him. However, if you're sure that he's safe and he is just avoiding you, I guess it is better to start accepting everything no matter how painful it is. If you know that you have done enough in reaching out and connecting with him, there's nothing left to do but move on. The process of moving on is crucial that's why you need support from your family and trusted friends. Spend time with them so that you will not feel alone. You deserve better and to be happy. There's reason for everything and by time, you will be grateful that it all happened. Furthermore, I agree with the saying "Things are better left unsaid" because there are words that deserve to remain in the past and couldn't contribute anything to build up your present and future.     

You definitely deserve an explanation. He can't just ditch out like that leaving you clueless. Try contacting his relatives or common friends using an unregistered number or name. I have a feeling he is avoiding you. Hugs girlfriend...

I will try that; thanks! I have tries to ask his friends too but it seems like he really is hiding from me. I will try to talk to his mom.

I don't think that things are better left unsaid. I would rather know and feel the pain than not knowing what really happened. You deserve to know the truth. You have the right to ask for an explanation. Ask him. Tell him. Use every means to contact him. But if he really just don't want to see you or talk to you, don't force it. Love yourself. Never force yourself to someone who doesn't want you. Always remember that their is someone out there made for you.

You really deserve an explanation, you really deserve an acceptable reason. Try to contact his friends or his family and explain what happen. Tell them that you need to talk to him for closure.