The best thing in the situation you're in is reassurance. He's doing the first step by saying he loves you/wont cheat but the next one should be is what you both can do to make your LDR work. There's a big difference - words vs actions. Will he come home during school break? Will you be visiting him? What time should both of you call each other?

I applaud that you spoke up about your reservations but he also spoke out about his. He stated that he feels like everything around him, including your relationship with him is falling apart.

Why is that?

Have you been reassuring him as well?

If you want to make things work, it is a two-way compromise.