NewLife,

Jealousy is natural and justified in yiour situation, as it was in mine. However, when you are sick and tired of feeling that way, I have something that worked for me:

Every time you have a poisonous/jealous/toxic/negative thought about him and his GF, you must replace it with a blessing. Ie.: "I hope his dick falls off and she gets uterine cancer." This must be replaced with: "God, give them happiness and contentment." Or, "I hope her dog is healthy." Or "May his job go well and he be at peace with his co-workers."

Now, you may say this is impossible and you can't do it. But I swear, it works. If you're desperate enough and want bitterness out of your life, this is how it's done.

The mind simply cannot hold two thoughts at one time. If you consistently drive out negativity with blessing, that is what will reside there.