No - you are ex's for a reason and if she has obviously moved on you should as well. Leave the past in the past and direct your interest else where.
Maybe they just want you to be their friend.
they still like you and can't help getting jealous seeing you with someone new or you did something that made them mad
'Ex' means the relationship is over and you should be moving forward into your future so no, don't give your ex your new address. If you feel you need too then you are not over the relationship and you should not be seeing someone else until you know that the first relationship is over.
when did you break up?
No. He will never try to get you back because he is eyeing someone else and he is more interested in a new physical relationship.
1. Does your ex have a new girlfriend If yes - obviouly not interested in anything with you as is seeing someone else if no - find another quiz
You cannot make someone love you and since he is seeing someone else you unfortunately will have to deal with that. Start going out with friends and start dating again and if you and your ex are meant to be together then you will be. If he does not come back then it is because you have not met the special person yet that should be in your life.
Ask her.
if she brags about her new boyfriend, she is probably just making you jealous.
trying to make someone jealous
ignore your ex
"never retard" That's a terrible answer. If they have kids he needs to know, because he's going to meet the new beau eventually. I say wait until you know the new relationship is a serious one, then tell your ex you have a new boyfriend.