You should not be jealous of an ex girlfriend.  Of course you realize that you should not be jealousy but you can not stop yourself from feeling that ping of jealously if your boyfriend continues to talk with his ex.  You wonder whether or not he told her of his love for her as he has told you. Just how deep is his love, you wonder.  You constantly think about  whether or not he is completely over his ex  and that is the real kicker.  If you are feeling jealousy for your boyfriend's ex,  then either you are not content with the relationship as it is or you have some serious trust issues.

The first thing you need to do is to talk your feeling over with your boyfriend.  There is nothing quite like hearing from the source of your jealously that you have nothing to feel envious about.  Your boyfriend needs to reassure you that you have nothing to be jealous or envious about. This reassurance can come only from your boyfriend and not with a conference of friends and what they think about the situation. If his reassurance does not quite hit the mark then you are either justified with you trust issues or you have major insecurity issues.

This is a free country and there are bound to be chance meetings between you and your boyfriend meeting with his ex.  You can tell by your boyfriend's reaction whether or not he is still in love with his ex.  If your boyfriends  continues to talk about her instead of you after any chance meetings. , then his attention must have been diverted to his ex.  Some relationship experts say that you should not discuss the trust issues with your boyfriend at all and to deal with your envy or jealousy on your own terms.  That scenario makes for a stressful situation when you internalize emotions.  It is better to get everything out in the open and to find out where the relationship is going by having an honest discussion about your relationship and your boyfriends's feelings for his ex.

If your boyfriend is not having it and just do not want to talk about his ex, then he may be hiding feelings that he still have for her.  Otherwise he would be able to speak openly about his ex  instead of having to brush anything under the carpet.  If your intuition is telling you that there is  cause to be jealous or envious of his feelings for you in comparison to his ex, then it is best to move on.  Hidden feelings are bound to come up sooner or later and you may find yourself without a boyfriend. 

Listen to your intuition and if you are secure in who you are and is not making up accusations for the sake of being and feeling insecure, make the right decision.  If you are worrying constantly about where he is in the relationship and how he feels about you, then you are insecure about the relationship.  You should definitely move on because the stress, worry, jealousy and envy is not worthy of your attention.  You deserve peace of mind when in a relationship and if moving on gets you there, then by all means move on.