Search Results: hanging out with friends high school

I've been dating my girlfriend for about 6 months and she is really great. She makes me food all the time, she is really hot, and she is so nice to me. However one thing she does that I just dont understand is get all uptight when I am around other women.

Normally she is pretty laid back with what I do (she is fine with me playing video games all night, or hanging out with my guy friends on weekends), but when I tell her that I was hanging out with some other girls she gets really flustered and somewhat angry. Of course I dont go out one on one with other girls, but I'll go out with 2 or 3 guy friends and they'll invite some girls to go along and I'll be with them. She usually finds out and always questions me about them (kind of like my mom used to when I went on dates in high school).

Or once I was the only guy hanging out with 3 of my girl friends (from college, before I met my girlfriend). After that I got home and saw my girlfriends eyes I knew I made a mistake, but my girlfriend was really upset with me. She was half angry half flustered that I did that, and while I regret my decision I didn't do anything bad. We just went out and got some food and had a couple drinks and then I went home.

Those girls are just old friends from college, its not that I like them more than my girlfriend, my girlfriend is really awesome, but my girlfriend just doesn't like it with I hang out with them. If she is there hanging out with us it is fine and she won't get angry with me, but she works late so a lot of times I can't invite her to our social events. If I am with my guy friends though its all cool, she doesn't care, its just with girls. Is this an unreasonable thing for her to do? What do you think?