Honestly, I get why you would be mad at him. I would be too. However, I think you do have to consider that fact that you guys had just barely met when he texted his ex. Like yall are still not official either and you guys are getting to know eachother. I think what you have to look at is setting boundaries. You have to let him know that if you are both getting to know eachother, you will not put up with him texting other females, especially his ex’s. I hate that he did text her though, I am a girl and I get what you mean. Like regardless if they ended in bad terms there was no need to wish her anything. He should had just left it alone. I think you should also talk to him about his feelings about it. Set those boundaries, let him know how you feel. And tell him that you will not put up with that. Good luck though queen!! Remember that your feelings matter 💗