How far into the weeds are you willing to be dragged?

DEAR CAROLYN: For the past few years, my friend, L., has been receiving personal training from K. They have a long, strange history that until recently had normalized.

In the last year they began to be intimate again despite his recent engagement to a woman in Texas and against my advice. The last time they saw each other, they were intimate but did not address his forthcoming wedding or their situation.

Now six weeks later, he is married and they are involved in a dispute regarding fees that has devolved into ugly messages and calls. L. is thinking about sending evidence of K.’s infidelity to his wife.

I find this ridiculous and hurtful to everyone and am advising her to forgo the money and move on, but it seems like her anger is about more. How can I convince her this is the worst approach?I’m trying to stop a petty dispute from escalating uncontrollably.

• Please Withhold Name

DEAR READER: Her anger is about more, clearly. It’s not, however, just about money plus wounded feelings over his marrying someone else.

This is about your friend’s emotional chaos. K. was the one betraying someone (presumably; who knows what the fiancee knew) and therefore is easy to point to as the whole problem, but you’re not K.’s friend nor are you asking me about him. You want to know what to say to L., and therefore you need to focus on the fact that L. is now a year, at least, into a sequence of choices that are unproductive at best, and at worst self-destructive.

Does she have any awareness of her emotional health? Do you and she have any history of honesty about the larger meaning of such high-drama entanglements, be it with K. or with others, since surely there have been other dramas?

If you do, that’s where you start - with a reminder that you and she have been down this unhealthy path before, and that she has managed to get herself off it before (right?).

If you don’t have that precedent with her, then you need to start from scratch by pointing out, kindly but firmly, that her getting sucked into all this - the messing with a soon to-be-married man, the “ugly messages and calls,” the idea of spite-bombing this new marriage - means she needs to take a deep breath and ask herself who she wants to be.

Does she really want to be vengeful and destructive? Does she want more of this marriage’s blood on her hands than she already has (especially given its chances of imploding naturally)? Does she want anger making her decisions for her? Or would she rather be guided by decency, courage and love?

Since there’s no guarantee L. will listen, you’re as much the target of this message as she is. While your intentions sound good, you also have been sucked in to the point where a deep breath would serve you well, too. Is an effort to “convince” someone not to be spiteful and petty really the best use for your energy? Is this who you want to be?

Certainly people lose their way sometimes, and certainly good friends help steer them back. Back to what, though, is worth noting, as is how far into the weeds you’ve been dragged.

Chat online with Carolyn at 11 a.m. Central time each Friday at washingtonpost.com. Write to Tell Me About It in care of The Washington Post, Style Plus, 1150 15th St. N.W., Washington, D.C. 20071; or email tellme@washpost.com