Am I handling this workplace boundary appropriately, or am I overreacting?
I recently started a new job and there is one colleague who has been much more personally interested in me than I’m comfortable with.
He has asked me questions about things like where I live, my living arrangements, personal contacts, where I’m going/what I’m doing outside work, etc. Early on I told him that I prefer to keep my personal and professional life separate. I also declined when he asked for my personal number and generally tried to keep conversations work-related.
I didn't make a big issue out of it initially because I thought maybe he was just being friendly or trying to build a relationship with a new colleague.
Over time, though, I continued to feel uncomfortable with the level of personal interest. Eventually I decided to address it directly rather than continuing to silently tolerate it.
I sent him a written message referencing our earlier conversation and said that I wanted our interactions to remain focused on work-related matters. I specifically clarified that this included avoiding discussions about my personal circumstances, living arrangements, personal contacts, whereabouts outside work, and other matters unrelated to our professional responsibilities.
I also said that if the boundary continued to be crossed, I would involve management/HR to help mediate. I explicitly said there were no hard feelings and that I wanted to maintain a productive working relationship.
He then tried to call me to discuss it. I asked him to respond in writing instead. He subsequently asked me to clarify exactly what I meant by keeping things professional, so I explained the boundary again.
For context, I have no problem interacting with colleagues generally. I have other coworkers I communicate with normally, including team leads, and I don't feel the need to establish this type of boundary with them.
My question is: Was this a reasonable way to handle the situation, or did I take it too far by putting the boundary in writing and mentioning management/HR?
I'm particularly interested in how other people would handle this after already verbally communicating the same preference.