Is this jealousy?

I have a Cancer moon.

When my girlfriend mentions her guy friends I get a weird feeling, as if I fear that this guy will take her away from me, but it only lasts for like a few minutes and it then it completely disappears, I don't even think of it again. I never ever talk about it, I just keep it to myself.

Is this what normal society considers "jealousy?" If so, how do I get rid of it?

I just kind of suspected it might be coming from my Cancer sign.

I get that and I have a Virgo moon so don't fret about it. It's normal to feel some but if you're aware of it, and it's not just festering inside to the point of you becoming a ticking time bomb, then you can rest assure that it's not really a problem.

It probably won't ever go away. The point now is to always remember it and to reign control over it. Try not to bottle anything up but also realize where it stems from. I have to give myself reminders and little pep talks in moments of weakness. I have powerful emotions (I am a Leo after all) and I used to be very reactive. It doesn't help that I have a minor possessive streak. It takes a lot of practice but it's best to be proactive in these things.

Big thing here. Talk. Communicate everything to your girlfriend. Chicks dig feelings, right? We also love to talk so what can be better than talking about feelings?

You're right ninjamu. Thankfully I never bottle it up, I can't even remember the last time I was jealous, simply because it goes away after a few hours. I suppose the more I think about it the more it gets to me.

I think when people feel jealous they accept it as an emotion immediately, because it's who they are. Whereas when I get this feeling that I just described, I feel the need to fight it and rid myself of it.

She's a Capricorn moon, so I don't know how far feelings will get with her.