(Unless you just want sex, and he is up for cheating.)Usually, during this process, he will decide to leave his new girlfriend and come back to you.
But if he doesn’t, you have to ask him about it some time.
You don’t want him to feel he is cheating on his girlfriend.
So, make sure you are just asking him to “catch up” or ” go for a coffee”.
But look at it this way, you are positive that he will be happier with you than he will be with her. But I know for sure that you are one that love your ex boyfriend otherwise you wouldn’t be reading this right now. Note: If you really messed it up after breakup, then I guess an apology is in order and a letter would be a good idea. You want him to know that you are glad he was a part of your life and that you want him to be your friend again. Now, you have to use this other girl’s mistakes as your advantage.
And if you want your ex boyfriend back even though he is already seeing another girl, you need to start looking at things from a new perspective.You will have to ask him to choose between you and the new girl.Tell your ex that you can’t be friends with him if he chooses to be with the new girl because it’s too hard for you.That’s because being friends with him while he stays with his new girlfriend is not good for your emotional and mental health.After you have spent enough time with him and he still haven’t made a decision, you have to be upfront about your intentions and tell him what you want.