I know that it's easier said than done; but try not to be jealous! Remember that SHE cheated on him -- he could NEVER trust her again! Also, remember the saying, "what I fear, I create." Don't let your jealousy of his ex, create a problem, that isn't there. Instead of investing your time in needless worry; invest your time working on improving your relationship with HIM! Go for walks together -- remember to keep the lines of communication open. Most of all, don't let him know that you're jealous, because men love happy, confident women! Best Wishes to you, in your relationship with him! Be Happy -- he's with YOU, not HER!