One of my friends is dating, but this girl that he is dating is a man user. My sister has know the girl for a few years now and said she dates guys for a few weeks and then dumps them to go after a different one. also when she is dating one guy she will be looking for the next one to go after. The longest one this girl has gone out with a guy is a month. I just don't have the heart to tell him anything because he seem happy with her and if I just happen to ruin that and she did not plan on dumping him with in a mouth. what if she had planed on going out with him for a good amount of time? Thats is why I'm waiting about a mouth to tell him. just to see what is going to happen. I just don't want anyone to be mad at me. I might have him read this if I don't have the guts to tell him.