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my friend found out her bf was cheating on her for the last 8 months of her relationship of and on they have been together for 2 years. he feels like even tho she cheated with his friend the ultimate betrayal that he can go sleep with other women to make the feeling of her being with his best friend go away. i say grow the ******** up try to find some way to get over it or drop the relationship all together . but neither of them want to leave each other. i dont know what advice to give her ....she says they have sex all the time, like a normal couple. she thinks for as many men out there , there isn't 1 like him. its like he cheated and its supposed to mean nothing she chose to stay with him but then she felt like he was just getting over on her and she wanted him to feel the pain she felt when she found out that he cheated and he felt it bad but once she had done what she did she wished she could take it back.

Pretty much this. Just because she cheated on him doesn't make it ok for him to go around cheating on her. They need to sit and talk about their infidelity and their relationship, and if they can't work things out, then maybe they shouldn't be together.