Wacky Life Theorist (and part-time absurdist) response:Feelings pass, are let go - when they're replaced with something else in your attention. "Healing" may very well consist of feeling something else, intensely, instead. Or otherwise occupying yourself with tasks that require your focus and attention.
Feelings AREN'T the end all, be all of authenticity. If humans were meant to be 100% "authentically" JUST their feelings - why do we develop a frontal cortex? It's how we choose to act and behave on our feelings that is the "magic" of being human.
Every person has a different comfort zone "balance" of thinking & feeling that is their experience of being alive and real; valuable and useful. What is comfortable for Ben, doesn't work at all for Betty - and individuality /spirit /DNA? - all help determine what that comfort zone is.
If "Happiness 24/7/365" was a real thing; achievable; no one would be motivated to creativity, or mind-numbingly difficult physical repetitve tasks. Chasing happiness, IMO, is one of the ways modern culture has gone off the rails. Oftentimes, I've lied to myself that feeling happy was all that mattered to me. And I'd go to extremes to try to find it - failing spectacularly. When, in truth, what it was - was I simply needed to appreciate and be grateful for all the things that are "just right" (for me) in my universe.
Sadness has a value too. It's a worthy emotion. But, at this point, I think I've come to the conclusion that the whole point of therapy - most kinds anyway - is to help people not BE STUCK - feeling just that one emotion ALL THE DAMN TIME. We're all going to have times when we touch base with our inner darkness. We're going to spend an undefined amount of time with all of them - comfortable feeling or not - and it's my experience (now) that we can spend enough time with those uncomfortable feelings until they pass naturally to something else and resume pursuing the goals or projects that were interrupted momentarily. Sometimes - it's a LONG time till it passes. But that's OK; it's what needed.
I hit a point in my grieving process (and juggling massive anger too) over Mike, where I was just SOOOOOOOoooo damn tired of crying, I just didn't want to do that anymore. And that's when I got my ass in gear to start purging the bulk of the Mike space-taker-uppers, dust collectors, and things I conceded letting him have because it filled some empty space for him. In him. Then, I found & bought the farm.

I didn't force it; I stayed with the grief till it shifted, let it shift through all the other things - till moving day saw me loading Mio-Mio into the car to make the last drive up here at sunset. We pulled in about 10 pm; in the dark; with a handful of unfamiliar keys.
Hops, I know you don't do well with solitude for extended periods of time. You perhaps could try to find a small group of friends nearby, to socialize with - singly or in groups. It doesn't have to become a mutual aid society or a daily practice but it would do you good, I think, to look in on some peeps you care about and not have so much time dedicated to sorting your own mess out. A small balance change at first; baby steps - might be enough change to replace attention to specific feelings that are stubbornly hanging around.
I accept that you're more emotionally oriented (as a poet) than the majority of people, including me. Your comfortable balance is gonna be different than a lot of people's. It's what floats YOUR boat, that's important and you'll need to engage your attention and perceptiveness in tiny refinements until you find what works for you. Your "recipe" for a contented life is a one-off; no two are exactly the same.
I need to run & make breakfast and then I'm sorting out a lot of studio crap. Getting it arranged & set up with the intent of starting to MAKE some things - pretties, utility items, dunno what all yet. I might even lose the urge to work out there. But it'll be ready & waiting (and CLEAN) for me to "play" should I have time & choose to do so.