You can't make a girl jealous only when you know the girl likes the guy. If you know that the girl likes the guy but already has a girlfriend, then spend more time with the girlfriend that the guy already has and then laugh alot areound her and if the girl you're trying to get jealous treat her like a friend but ignore her, but not too harsh!
Yes you can but it also helps if your girlfriend isn't the jealous type.
Assuming you've already apologized and promised not to do it again and she's still on about it... dump her and find a more reasonable girlfriend.
Trust her.
yes it means she fancies you
If you easily get jealous when your girlfriend talks to or befriends other boys, you can stop that by being positive always, and trusting your girlfriend.
make your girlfriend jealous
You can become less of a jealous person with your girlfriend by giving your partner space and learning to trust your partner.
A jealous (boyfriend girlfriend husband wife) you get it right :)
maybe try to make you jealous and tells you they have a girlfriend already if they do not like you
its the girl that you like and your girlfriend is jealous of, therefore she hates her and calls her your "anti-girlfriend"
be jealous and then try to be friends with that boy until you get close and then you can make her jealous.
I think that a boy make you jealous with his girlfriend because he just want you to make u jealous and you don't looked at him and i think that he might like u and you don't even flirt with him.