So, what you should do is not feel sorry for yourself, but cheer up.
First of all, you can let go and tell yourself that such a woman is not worthy of your nostalgia or sadness for her, but you should be glad that you saw her nature and true colors earlier, wave your hands and bless those two people and see how long their passion can last.
Second, you can choose to curse them. In fact, the handsome coaches in this gym are all old drivers who are good at coaxing women and how to win their hearts, but at the same time, such people are actually very restless, and it is estimated that they will be separated from your current girlfriend sooner or later. All you have to do is curse every day and expect them to break up every day.
The third way is to go directly to the gym, but only if you are not afraid of being beaten, haha! That kind of fitness instructor should be very powerful. You went, not to fight with them, but to spoil the situation, that is, to let the whole gym know that this fitness instructor fell in love with someone else's girlfriend and humiliated him.
The fourth way is to go to the gym by yourself and make yourself handsome. No matter what way you use, anyway, when you stand in front of your current girlfriend again, you must make her speechless with surprise and make her regret leaving you!
The fifth way, in fact, is similar to the fourth way, which is to make yourself rich and rich, and then, deliberately let your current girlfriend see it, deliberately want to hang around in front of her and make her regret leaving you! Otherwise, you are a rich man now, haha!