I have a girlfriend who has been my best friend for many years. While she was married, she had an affair, and since her divorce she has continued an on-again/off-again relationship with this man. He's cheated on her and has been unable to commit. Each time they go into crisis, I've been there for her, even answering 2 a.m. phone calls! The last time they got back together, she hid it from me because she knew I wouldn't be happy with her decision. Our friendship was also strained for several months after she said something hurtful to me regarding my failed attempts to conceive. I eventually wrote her a letter, saying I wanted to try to mend the friendship. Now, we're in touch, but we see each other much less often than we used to, and it's awkward. I feel hurt that she so easily walked away from me, yet she'll go running back to this man who treats her like crap. Can you help me figure out if this friendship can or should be saved? -L.W., 40, West Deerfield, MA
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