I think that our minds going to old connections is pretty common. It isn't bad unless it becomes a fixation or something which prevents you from properly living in the now.
I also think that more people than want to admit it are in a similar boat, since the pandemic, since connections are so rare, these days.
I am happy that we have managed to maintain a connection through all this time. Life can often end up feeling like you are the last one who hasn't yet left a party which never really started.