<human>: This is my second relationship and both have been long ones, and I always find myself jealous about seeing (let's call her Alice) Alice talking or hanging out with male friends, the worst part is that I'm 100% sure that I have nothing to worry about, but still, It still keeps eating me up.

I told her at the beginning of our relationship that I am a very jealous man, she said that she doesn't like that, and we kept at that.

Now the problem is this, I'm always the one who does fun stuff in our relationship and she loves that and so do I, so I'm always making her laugh, cheering her up, talking about stuff. But when I see something that makes me jealous I don't like to talk to her about it because I know that it's stupid and it's over nothing, but it makes me a bit sad so I can't be the fun guy she's used to, and as soon as I talk to her she knows something is up, and I usually tell her I don't want to talk about it, and she hates that.

I know I can't change how I feel, and to be frank I don't want to, it is who I am. I don't want to talk to her about it everytime because it will be not fair to her I guess and it will only make things worse probably. And I don't want to keep upsetting her with my mood changes and not wanting to talk about it. So what should I do? any thing could help really.

Can you condense the text into a few key points?
<bot>: I'm a jealous guy, I don't annoy my girlfriend with it, but it's affecting the relationship anyway, what should I do?