Check her mobile phone for text messages from a certain unknown number that may come up or if someone rings her and she says "its ah my grandma or just a friend" that you may not know of.
Or find out whats she is doing on the days she is not with you so you can check up on her. If you see an unknown number on her phone get one of your mates to call it (a mate your girlfriend doesnt know) and see if they answer and ask who they are talking to because you got a missed call from them or so and so told you they are really good at something you need inquiries about and you needed to contact them. Just make up something. Or get a mate who your girlfriend doesnt know to find out from her friends or friends that are friends with the ex the last time they were seen together.
Or find out whats she is doing on the days she is not with you so you can check up on her. If you see an unknown number on her phone get one of your mates to call it (a mate your girlfriend doesnt know) and see if they answer and ask who they are talking to because you got a missed call from them or so and so told you they are really good at something you need inquiries about and you needed to contact them. Just make up something. Or get a mate who your girlfriend doesnt know to find out from her friends or friends that are friends with the ex the last time they were seen together.
