What would you prefer? To grow in jealousy and get all those jealous feelings inside of you; feel bad, upset and spoil your vibrations, or to be happy for someone else, wish the best for the person you love!
I know the second option is difficult, but the first is not easy either. It is even more difficult to bear the jealousy and walk around with it, isn’t it? Think about it.
Anyways, life is short. Everything is going to finish one day. Think about it, you will have more peace.
Whenever anything disturbs you, you feel injustice, uncomfortable, or you feel you can’t sleep or can’t handle it, remember it is all going to end! Everything is going to finish, and you will be gone from here. You will be able to sleep well. Again, this is dispassion.