When he was dating other girls, he was dating his ex-girlfriend. When he is in contact with you, he is also in contact with his ex-girlfriend's boyfriend, and likes to wander among girls, but I think you are worried about this behavior, so you will have the action of "watching their chat records".
This behavior of men is certainly wrong. Put this aside first. The teacher wants you to know your needs first. If the teacher asks you, "Can you leave this man and start a new relationship?" I think you actually have a negative voice inside. If you can, you won't contact him again after breaking up with him again. Getting back together, including your coming to the teacher for consultation, shows that you are not ready to really break up.
In this way, the main contradiction is: what can I do to cut off the contact between my boyfriend and my ex-girlfriend?
First of all, what you did before was incorrect. You are actually in the "painting camp": your own camp, your boyfriend and ex-girlfriend have been pushed down by you. So you see, the more you argue with a man, the more he will think that he is very ambiguous with his ex-girlfriend, and you are pushing him away.
So how to do it? You have to hold your breath first. You've seen their chats. What you care about is that he lied to you. According to your descriptive tone, the teacher guessed that the content of their chat should not be "out of line". When the ex-girlfriend comes back, the most common tricks are: rescue, such as being scolded by the boss, feeling particularly bad, and asking for help if you can find a place to live in a new job.
The teacher suggested that when your current girlfriend asks for help, you can give advice to your ex-girlfriend together with your boyfriend, how to help you and what to give you. This is actually the most invisible oath of sovereignty, telling your ex-girlfriend that you are lovers. If you find that their chat content is not asking for help, but more irrelevant greetings, then it actually shows that you did not respond to his emotional needs in the process of getting along with your boyfriend, but he can get it from his ex. What you need to do now is to know what men really want.
In fact, from the moment we decide to part, every breakup is a growth. You need to know where the contradiction is, what your own needs are, what the other party's needs are, and how to satisfy the other party.
If you are angry and make up with your boyfriend, you can make an agreement with your boyfriend for future protection: if your boyfriend is going to help his ex-girlfriend, you should accompany him; If your boyfriend is just flirting with his ex-girlfriend, you can first "show weakness" and say that you may not care much about his emotional needs, and you will do well in the future, but at the same time, you should establish some "principles", for example, if you find out what kind of punishment or consequences you should have in contacting your ex-girlfriend, you should correct your attitude. If a man shows the same behavior over and over again, girl, you should learn to let go. It may be difficult, but you still have a choice. Find someone who is more suitable for you.