To Snitch or not to Snitch?
Looking for some perspective here.
Long story short, I and a mid-level banker got into a bit of an argument a few weeks ago and he texted me some really inappropriate stuff. I didn't escalate this to management or HR, because I didn't want to "snitch" about something like this. Next thing I know, the same guy screwed me over in my 360 accusing me of some serious stuff (it shocked me totally because I never did any of those things plus the one singular interaction didn't seem like the kind of thing that would escalate). However, now all his accusations are in writing.
I showed the screenshots of the conversation to my manager, who has known this guy for years. My manager is "verbally understanding" and agreed that this guy can be a "bit too aggressive" but is 100% intent on putting the other guy's side of the story in writing. I have been hesitant on putting my stuff in writing so far, not to escalate but it's now becoming clear that I am being bullied because of that (the conversations are as clear as day and light and will very easily escalate to upper management).
I am really annoyed because the mid-level banker seems to believe there will be no consequences for his actions (I mean he is the one escalating this) and my manager wants to just do the bare minimum (and is counting on me not escalating this). I didn't want to have this kind of a struggle early on in my career and I went out of the way to avoid this, but my unwillingness to escalate is being taken advantage of.
What should I do?
P.S. I already have a job lined up at a former employer, but the industry is pretty small and I am worried about having this come up in the future.
EDIT: I just got off the phone with my manager. I threatened HR, to which he promised to remove 95% of the stuff the other guy wrote. He also said this is not escalating to HR and stays within the team. He said he will talk to the other guy about "behaving properly at work". Obviously, he is trying to stop further escalation, but still, anything in writing makes me look bad.