First of all hi to everyone im new here

second, my girlfriend doesn't seem to like my jelousy so much.
I used to live like 200 Km away, but now im staying at her place. In our first 3 months she left me alone for 3 days to go to a concert with a "friend", I didnt like that because i never met the guys, and i didnt know anything about him.
while she was away i was looking into her computer for MSN messenges she had the de days before. I found out she was talking and texting with a guy she knew from a chatting room or something, and the chattings she had hurt me alot. Talking about how she would go with him when she brakes up with me, add some webcam plesseurs with it... etc etc you know the deal.
When she came back we talked about it and she got very mad about me reading her privacy?!
Now, 10 months later, we are having a baby.. and i am still very jelous, i wont let her talk to ex boyfriends, and i get very depressed and sad when she is on msn. Everytime she is on msn i am trying to go and sit next to her just to sit with her and watch the screen. then she gets mad and closes everything, and telling me she may not talk to friends that she may not do anything etc.
I have alot of talks with her mother, and she understands me, but i cant help it to keep getting jelous. our sex life is great, so i should not be worrying to much, or do i?
greeting, Erazor