Find out if your ex still loves you and of so: Great! Go out with them again if you can trust them etc. If they dont: Stay with your new parnter and have some fun with them
It means your ex is still in love with you and can't take it when you fall in love and sleep with someone else.
he would be with you now if he loved you, not someone else, you need to move on with your life
forget him and find someone else
Do you still love your ex? No? Then you simply stay with the one you are with now(assuming you love your current boyfriend/girlfriend) If you do still love your ex, ask yourself who you would be happy with. What was the reason you and your life left each other and so on.
why are you telling me about your personal life? whats wrong with you?just go find love with someone else ...like me!
get over it already
Nothing. They are your ex for a reason let alone they are with someone else. Keep going and don't look back. Think of all the future opportunities.
do whats best for you
well when you use somebody else to get over your ex-boyfriend you will end up falling for that person and that someone will leave you for someone else that they love,all you got to do is to tell him/her straight that you are still in-love with him and that will help you a lot if that helps me than maybe it will work to you..
Try emailing.
Anything is possible.
I Don't know ask someone else.