OP you need to recheck the definition of gaslighting. It’s when someone tries to impose a false reality and make you question your sanity by intentionally lying to you.

What this person did was simply misjudge how you would react to some information. That happens all the time. Just recently my gf avoided telling me something because she was worried I would like her less if she told me. She was incorrect as the thing she wanted to tell me didn’t bother me at all. That’s not gaslighting, it’s just an insecurity.