text: Ouch... if I were you I would definitely ask about it... just kind of lean ito it with questions like, "why were you outside talking on the phone?" "who were you talking to earlier?" Or go straight out and ask him who he is going to lunch with next saturday and when he is   at lunch give him a small phone call. You have every right to be concerned I know I would be. Normally when a girl becomes suspicious of her boyfriend she is usually about 60-80% right about what's going on so definitely ask him about it before you drive yourself crazy. Leave him if he is keeping into too much touch with his ex. It'll become a lot of trouble in the end. Good Luck.