There are several issues to deal with when answering this seemingly simple question. Make sure you know all of the facts and consider all of the options before you decide to confront him about it. Here are some things to consider:
1. What are your boyfriend’s intentions in talking to his ex? If your boyfriend is just talking to his ex because they are still friends, it may be fine. If your boyfriend is talking to his ex and still has feelings for her, he is not being fair to you and your relationship. If your boyfriend is having conversations with his ex to resolve old relationship issues, maybe he’s not ready to have moved on to you already.
2. Is your boyfriend trustworthy? If your boyfriend talking to his ex bothers you a lot, you may want to examine other areas of your relationship where you do not trust him. Trust is crucial in relationships, and if you feel like you can’t trust him, maybe you should not be together. If you do trust him, surely you can discuss this issue with him and feel quite resolved.
3. How would you feel if your boyfriend were upset that you were talking to your ex? Your answer to this question could be that you would stop talking to your ex out of respect for your boyfriend. You may, though, think your boyfriend is being ridiculous and continue talking to your ex. Think about what you would do and what he is doing before you start judging him.
Openness, honesty, and good communication are always forces that help drive a healthy relationship. If these qualities are non-existent in your relationship, you should probably clear that up, and it might erase other problems, like being concerned if your boyfriend talks to his ex.

