No two people are the same when it comes to mourning or grief. No one but you knows how much you have "invested" in a person, how deep the relationship goes (and length of time together has a lot to do with it too; if you were with someone 1 year that can be very different than if you were with them 5 years). There is no "should" about response. Just because someone is a relative doesn't mean they impacted our life that much or that their death is going to impact our life.

Just because you "appear" to be over someone does not mean you are, even you may have trouble with thinking you are and get blindsided by a trigger that reminds you of that person and what you miss later, after you thought you were over them.

"Missing", to me, is a form of sadness. Just because you do not cry or carry on, just like there is no right length of time, there is no right way to "get over" someone.

If you are not worried, you are not worried! No, there is no one else like you out here; we're all individuals with our own histories and responses. If you are not bothered by your response, it doesn't not matter what others think, yours is not their life.