ece711
A few thoughts from me about your question.
Teenagers and young adults may use some of the same phrases, though I'm not sure "I love you but not in love with you" is a common teenage breakup phrase.
The reason I think these phrases can be attached to MLC is because they tend to demonstrate that nothing is really wrong with the marriage itself. That may be why these phrases can be called "bomb drops". Saying these words so suddenly after 10, 15, or 20 years of marriage is different than after dating someone for a few months.
Also, on this particular thread, many of these script lines show the MLCer actually taking some of the responsibility. A big part of the script in my case is similar to what Readytofixmyself first wrote.......which is projection. My ex-wife took very little responsibility for how she felt.....she projected it on me....yet she is the one who wanted the divorce.....yet it was my fault that she did.
One of the commonalities in my case, my friend's case, and it looks like also in Readytofixmyselffirst's case, is the MLCer talks about a lack of intimacy. The commonality of the scripts in my case and my friend's case went beyond the breakup itself.