I don't want my girlfriend to go Las Vegas with people she has known for less than 2 months, is this going to hurt our relationship?
Less than two months is a short period of time. Do you feel these people that she knows less than two month are going to be trouble? Why would you be so worried?
Yes, I know all of them, they are not good people
It's not very good to tell what your girlfriend can do or cannot do. It's a bit controlling on your part and might cause some tension in the relationship. Does she have good judgment in people because maybe you should give her to benefit of the doubt?
A; I'm a control freak and she needs to do what I say. I'm not putting up with her rebellious acts.
Are you sure you know them, and for how long? Maybe it is just your own opinion and they will be good for her to hang out with. Also people do change after awhile as well, it's bad to be a control freak.