I want to talk about a specific kind of guilt: the friend you ghosted. Not dramatically. You didn't decide to cut them off. They texted, you meant to reply, you didn't, and a few days became a few weeks, and the longer it went the worse you felt, and the worse you felt the harder it got to write back, until "sorry I've been quiet" curdled into "I've left this so long there's no fixing it." So you said nothing, again, and added another layer to the thing you're ashamed of.
I've done this. Most people have, from one side or the other. The cruelest part is the loop, because the guilt that should pull you back toward your friend is the exact thing pushing you further away. Every day you don't reach out feels like more evidence of what a bad friend you've been, which makes reaching out scarier, which keeps you silent. It feeds itself in the dark.
Here's what breaks it: a short, honest apology that owns the disappearing and doesn't bury your friend in reasons.
The instinct is to over-explain. To send a paragraph about how slammed you were, how life got away from you, building a case for why the silence was understandable. But a wall of reasons quietly turns the apology back toward you, toward getting yourself off the hook, when what your friend needs is to hear that you know you left them hanging and you're sorry for it. One honest sentence of context is plenty. The rest is for you, not them.
What I'd send:
Hey. I owe you an apology. I went quiet on you and left your message hanging, and that wasn't fair to you. I got overwhelmed and disappeared into myself for a while, which is an explanation, not an excuse. I've missed you, and I'm sorry. No pressure to reply quickly, I just didn't want to let it go any longer.
It owns the thing in plain words, and it gives one line of context while naming it as context, not a defense. It doesn't grovel or ask them to comfort you. And it leaves the door open without demanding they fling it wide right away.
Because they might be a little hurt, and that's allowed. The temptation, after an apology, is to need instant reassurance that everything's fine. But you went quiet on them, and they get to feel however they feel about that for a minute. Let the apology be a gift you're giving with no receipt required. If they're warm right away, lovely. If they need a beat, that's theirs to take.
And drop the idea that too much time has passed. The story that says "it's been too long now" is just the guilt talking, and it's almost always wrong. People are usually relieved to hear from a friend who vanished, not poised to reject them. The silence felt enormous to you. To them it's often just a question with no answer yet, waiting for you to finally send one.
So send it. Own that you went quiet, and let them feel however they feel about it.