Am I doing the right thing (details inside)?

I want to come clean with you about something: recently I have been asking a lot of questions about the Revolutionary War. That is because I’m doing research for a story. It’s about a Patriot Captain and a young Loyalist woman, both suffering from depression and crisis of faith as they doubt whether they have chosen the right side of the war. The Captain is depressed because he is torn between his empathy for the Loyalist civilians who are assaulted by the Patriot and his loyalty for the cause he’s fighting for. And the woman is depressed because she starts to feel sympathetic for the Patriot soldiers whose living condition is so horrible they have to beg around for food, but that also means she is betraying her belief that fighting against the King is wrong not to mention going against her own family. As the two meet, they experience a strange feeling for each other: on one hand, they can’t see eye-to-eye because of difference in social status, political belief and personality; on the other hand, they can relate deeply to each other’s problems because they are actually struggling from the same crisis.

I’m excited about the idea, but also really, really scared. My biggest fear is that I won’t be able to present history as objectively and accurately as I want to. I come across too many contradicting opinions on the war, and I’m afraid I somehow do the wrong research, and write something that is as offensive and inaccurate as a Mel Gibson’s movie. Moreover, I’m afraid the idea itself has a problem. I’m writing about a historical event, but I also add my view as a modern person into it. I’m afraid that is going to affect how history is presented, and I’m not sure if this is also what other historical writers do.

Much as I like the idea, I just can’t shake the feeling that I’m stepping onto a territory where I shouldn’t be. Is my story idea the right idea to be executed?