If it is your ex it really should not matter if they have someone or not nor is it really any of your business. You need to focus on yourself, let go and move on.
Ask them.
If you truly love someone then an ex coming by should not be a big deal. When you love someone you know that the ex no longer matters because he/she was not the one for you. IF you are tempted to do something with the ex then maybe you should reconsider saying you love the other person.
You don't, unless someone you can trust tells you, or you see her. But, as she is your ex-, why concern yourself about it!
uhm... they scream at them i hate you. Rach is gay.
If you are with someone else then it really should not matter what your ex thinks either way. If you are trying to make him jealous and just using someone to do so that is wrong and not fair to that person. If your ex is jealous you will know by the way he treats you.
decide if the feelings they have for the ex are bigger then the feelings they have for you. Everyone always has feelings for their ex - good or bad - so when you hook up with someone you just have to be sure that their feelings for you are stronger.
if you know that then why dont you get someone else that really likes you that would never cheat on you
If a person is making cruel comments to you then you can be sure it is your ex talking behind your back. Ignore the comments and be a bigger person than your ex. You've won because you got rid of the ex and now you know why.
I Don't know ask someone else.
if someone you dont know/know gives it to you. ex: open drink. never take anything from strangers!
She probably wants you back.
I don't know your ex's personality, sorry... ...and I don't know how you broke up. Could be possible. I could not know from a distance without knowing you both. Check back with your ex to find out, do you know a friend of hers, you could ask if there is someone new in her life?