Should I approach my girlfriend about this guy?

[Cory]

I've had this problem. What I did was talked to her about it and told her to imagine she was in my shoes. Like how would she like if some girl was getting more involved in my life and the girl likes me. Make them feel sad about it. Make her feel how you feel. I did and she understood. she has nothing to do with him anymore. If she acts like she don;t care and shes been putting u off or acts weird. I'd be worrying. The way I see it is theres plenty other woman out there