Tater - Not lame. Feeling low is not trivial. We may not lose all our hair and throw up all the time, but we're still fighting-fighting-fighting with all our might a rotten foe. And we get tired and discouraged sometimes. But let's unpack your troubles and see if they loom as large as they seem:
You appear to not be the speediest responder on record, BUT you are not way out there slow either - not by a long shot. Many of us longtimers didn't get to MMR before two years and have eventually gotten to double-zero-to-the-right land. Your white count and neutrophil percentage are also shared by many of us. It can take YEARS to change, and then decide to stay (forever, probably) just at the bottom of the normal range. No big whup. The proof is how you feel or if you have trouble throwing off infections. If you don't, then your immune system numbers are fine for you. It's true that the docs like to see at least a 1 for the neuts, so just keep an eye on that.
The liver numbers I'm not capable of commenting on except to say that a good question for your onc is: what is considered a very high and dangerous number that would get your attention? It may be much higher than yours. Still, a good idea to keep an eye on them, and he is. I know you're not worried about short-term but rather long-term: what does all this MEAN? If it is helpful to your psyche, do as much research as you can. If research freaks you out, leave it alone and trust that you will have time to react, ponder your next move and you have options, should you need to move on from dasatinib.
You will be around to be Mother of the Brides! When I was at your point, I found psychotherapy (cognitive behavioral) to be extremely helpful. I found a therapist who had a lot of experience with cancer patients. The biggest takeaway I got was how to recognize and deal with catastrophic thinking, anxiety, and fear that are cyclical (like every PCR!). The feelings you describe will, more or less, always be with you just as the CML is BUT! The degree to which you can control your life - your thinking, actions, decisions, perspective - is key. That's where an even keel, even happiness (yes, remember that?) lies. When you feel at least a little bit in control, you feel braver to face stuff.
Covid makes everything harder. You're a trouper with three kids' education to manage! Cut yourself some slack to feel down. Then do something - anything - that you know is good for you (get outside, take a walk, clean a drawer, do four pushups haha, etc) That gives you the FEELING of control, and leads to good things.