You’re not alone in thinking this …

Of course it could just be that we live in an unfashionable part of the galaxy … a bit of a backwater.

Or on the wrong side of the tracks as it were.

And, whilst there might be one or two weirdo alien anthropologists who’d like to come and study us, the distances involved make it prohibitive, because they can’t get the funding/support in terms of the number of people who’d need to agree to take part in order for their 10³⁰⁰⁰⁰⁰⁰th grandchildren’s generation to finally get here — there are nearer alternatives … and that’s where the resources will be invested, if their species is going to attempt contact with another planet.

Alternatively, those people predicting there must be other lifeforms only do so because they have no concept of how probability actually work in an infinite possibility space: Given an infinite number of potential sequences, every sequence has the same chance of turning up … so, it’s entirely possible that we live in a universe in which the roulette wheel of life turns up ‘1’ every time — or rather, turned up ‘1’ the first time and ‘0’ every time after that. It doesn’t mean it mightn’t turn up a number greater than ‘0’ at some point in the Future, but it needn’t do — nor need it have done so yet either. So, we could simply be entirely alone. It’s the halting/tiling problem writ as large as it is possible to be writ: until we find an exospecies out there, we’ll never know … and they could all just be keeping very quiet, as you say.