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It's really hard to advise you. I also married young, and have been married for over 40 years, but every person and every relationship is different.

All I could suggest is sitting down with her and saying you want to stop playing games and be totally honest with each other, and think about whether you really do want to spend the rest of your lives apart and co- parent your son, with all the difficulties that would entail. Sometimes realising what could happen if you don't change things is sobering and helps you get things in perspective. 

To recover from a situation like this you need to both be able to "wipe the slate clean" and start afresh, no recriminations, complete honesty from that day forward. You may also need to cut some other people out of your lives, at least for a bit, while you focus on repairing your relationship and learn to live together happily again. 

I do not judge you at all, I wish you the best outcome.

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