My best friend that I have known since elementary school confided in me about something that I view as heavy, but I really don't know what more to say to her.. She's with a great guy who I have met many times. They've been together for 4-5 years I would say.. she told me that a man she used to be in love with his has been texting her, and that has led to some intense sexting and she is an emotional rollercoaster because of it.. I advised her to try cutting him off again cold turkey but she isn't sure she wants to.. I obviously love my best friend but I would hate to see her guy get hurt.. I know how her love with the former love was and she was so head over heels for the guy, so I'm just scared for her, that's she's going to throw away a good relationship with a good guy for what might end up being a casual fling.. I might be wrong, but I really don't know what to tell her.. I know the heart wants what the heart wants and I'm not at all judging but I am her listening ear without much left to tell her.. I guess my question is, am I telling her the right thing by telling her to let the old love go? I feel for everyone involved..