[Good - she thought so (though she does wonder how bad it must have been for him to feel that at present, he's no longer friends with Kel).]

That's the most important part, and the first step. But I'm afraid you'll have to plan things out a little more, just like you need a treatment plan for an injury. Did you say something mean that you need to apologise for? Or did you tell the other person a painful truth that they find hard to accept? Or could you not agree on how to solve some other problem? We have to figure out how to mend this wound.