Still relatively trustworthy.
He has been in the army for five years, experienced a lot and cherished a lot. If you ask, you have a crush on him. In fact, when you get along emotionally, don't take being a soldier as an example. Love has no national boundaries, no age, no status, no time and no feelings. Then feel, you feel good, feel good, and feeling will give you a feeling for a lifetime.
One more thing, you are classmates. Think about what he was like before. Generally, it will not change easily, but will only hide.
The view of feelings and a person lies in mutual respect, mutual understanding and mutual help between two people, so it is a matter for both sides. Don't take military career as a bargaining chip. You need time to adapt, you need feelings to hone, you need time to test, and finally I hope you will be happy.