How can I restore my 5 month marriage, before it's too late? Is it too late?

Can you dare to show this question to her face-to-face? Ask her to read it loud to you and see what is her reaction. If she truly loves you, she'd say so. And if she does not, there will be no doubts left amongst both of you. Pls. remember that nobody out of you two can solve your situation. Both of you should never ever lose the respect of each other. And if you or she has already lost it, then either of you is better off without the other i.e. divorce. You don't have to do it urgently. Just have patience and perseverance when you can see her on your next home-coming from duty. And if possible, don't snoop onto her unnecessarily, giving her the freedom that she deserves. You must trust her so that she can trust you as well. She's not bound to you and you are not bound to her. Both of you have nothing but mutual respect and love for each other together. So, pls. preserve it until you see her face-to-face with this question. And don't forget to show her this question in entirety cause it is voice of your own heart that she should be able to listen loud and clear. Hope it helps.