Break the relationship or continue?
If you have tried by all means to change your attitude, keep in mind that things can get worse, so it is best to put a stop to the relationship. A relationship that is based on jealousy and mistrust will not bring you happiness or emotional well-being.
On the other hand, if you want to continue there must be changes, otherwise neither of you will be happy. In that case, it will be important that you invite your partner to control their jealousy and seek professional help if necessary, because only in this way can they find the peace that both deserve.