Oh, I see! Life is meaningful because we love life. Yeah, I'm onboard with that.
I guess I just never associated love of something with the word 'meaningful,' but that totally makes sense.
I dont think its as easy to draw boundaries as you do, also I think while that appears neatly demarcated it is reductive, empiricism is not all it is cracked up to be and I'm not simply talking about metaphysics and spirituality/religion, which I detect a dismissive aversion for on your part, but quantum physics, other sorts of theoretical and research domains, logic, inferences, hypothesis, all exist which are not strictly empirical but basically the best guess, without being invalid. I think that all knowledge should strive towards the positive.
It's not all cut and dry, no. Like how arguing philosophy does require logical rigor -- if you want to do it persuasively, at least -- and how psychology is a relatively (some might say notoriously) uncertain science. But there absolutely is a difference between what is -- demonstrable facts, or at the least trends and probabilities -- and the world of ideas and beliefs. A wheel doesn't roll because we think it ought to or because we believe it does; a wheel rolls because rolling is a consequence of its physical shape. My computer doesn't work because I've decided that it ought to work or because I want it to work; it works because a lot of different people put a lot of time and effort into determining the independently-existant physical facts which allow it to work. (Electricity, magnetism, semiconductor/insulator/conductor properties, etc..)
Conversely, I've recently sent a few prayers to a god I invented. Not because I can demonstrate that my god is a fact -- by definition, metaphysics are beyond provability -- but because it relieves tension and because I want such a god to exist. That's belief...or at least, wanting to believe. On a separate but related note, I help people because I have empathy and I believe in bettering the world around me. Again, no physical facts involved; just philosophy and emotion.
Putting facts in the same box with philosophy in the same box with religion in the same box with spirituality is reductive. That way lies the madness of young earth creationism, and other nonsense derived from dogmatic tribalism. And yes, I am absolutely dismissive of such fundamentalist religious nonsense.