One of the worst things in here is jealousy. It will eat you and your relationships up. So what do you do when you feel that? One thing I learned from Susan is to use that. If you feel jealous of someone, get to know them.
It’s harder to be jealous and upset about someone that you know and is your friend. You may find that instead of being hurt you wind up making a great friend. If your partner likes them there’s a good chance you will too.
It’s also important to be friends and close to the people that are important to your partner. It adds strength and stability to your relationship. And your relationship is the most important thing you have here. So treat it like that.
The exception to this is if the other person requires exclusivity and is therefore pulling him or her away from you. If someone does this they are only going to hurt somebody probably very badly, whether it’s themselves, or you or the person in between, or probably all of the above. And not wanting your partner to go with someone that requires exclusivity, isn’t jealousy actually, it’s really just not wanting to lose them.