I have been in contact with my wife for 6 years, and recently I found that my wife has been sending quite ambiguous messages behind my back and my first love. What should I do?

So you are also very careless. Your wife and her first boyfriend have been dating behind your back for so many years, and you know nothing about it. At least she always does something different. After all this, do you think you will get back together? Don't believe her, what is only emotional infidelity, not physical infidelity. Whether it's emotional or physical, it's cheating. Besides, some vague messages sent by your wife behind your back are enough to prove that she doesn't have you in her heart. If you go on like this, I'm sure you won't be in a good mood. Long pain is better than short pain. Forget it. Take care of your children. Unless your wife realizes her mistake and dares to correct it, be kind to her family and children, it is better to leave. I hope you have a good and happy life, and I hope I can help you.