My boyfriends EX

I think others gave you good responses. I think you should keep an eye on it, its natural. However, an ex is an ex for a reason, and if your current involvement has enough sense he'll not get reinvolved.

He may not know how to ask her to stop flirting with him. Maybe, she wants him back. You must find out how he feels about her and whatever he tells you, believe it, until he gives you reason to believe differently. If you are that into him, maybe if you guys got married you would feel a little more secure and a part of things. Maybe then she will give up flirting with him.

I think just trust your boyfriend, dont be insecure. she is just the EX and you are the future.

It is to the benefit of his son if he gets along well with his mom. Communication is very important even when the parents are not together. Unless you have good cause to believe that you can not trust your boyfriend with his ex then I think you should keep your feelings to yourself on this one. Trying to be a little more understanding to his situation would go far in making your relationship closer. This might not be easy but it will be the best for you both and his son as well. Good luck with this one.

Of course jealousy is an obvious factor in this situation. You can't fight off jealousy even if they have a valid reason why they talk or see each other, which is their son. I don't know how to advice you on handling this, I know it's hard but I guess you have to live with it since the son is there. Hmm... Maybe talk to your boyfriend about it? In a serious conversation I mean.. Tell him how you feel and make it clear that there's nothing more between the two of them

I've gone through this numerous times with my husband. His ex-wife and his son's mother were like this. Thankfully after 5 long years they have both moved on. No matter what he said or how mean he was, they wouldn't quit. It was the most annoying thing ever! I definitely feel your pain. Maybe he doesn't say anything because he is afraid of losing contact with his son over it. I know my husband's children played a big part in how he reacted to situations with them.

Obviously you can't stop them from seeing each other. Ask your boyfriend how he feels about this girl. As long as he is faithful to you then that girl will only look stupid doing all that flirting for nothing.

This is such a hard situation. For one, they have a son. That will be their link forever. In your case, you have to be wide awake of what's happening between them. You don't need to judge right away. Just be wide awake.

The problem is not just "her," it is equally your boyfriends as well. It takes two to tango, and he needs to tell her to "knock it off" in no uncertain terms. Unless he enjoys her flirtations and it makes him feel special. If not, it is his responsibility, and his alone to put an end to it. If he is allowing it and playing into it and making it YOUR issue "you are the insecure one," I would trust your gut insticnt here and lose him. Find a guy who respects himself and you. Good luck!

Talk to him about it...nothing will get solved by just wondering or getting mad. As long as you talk to him about it and of course trust him you will be fine. You of course will be jealous and that is alight...but doing nothing is not.