Love isn't lost, it only changes form.

You can start with something smaller than moving on: appreciating what was. That sentence, they were the one for me and there will be nothing better, is one of the most common in the first weeks, and it holds some truth: what you lived was real. What the sentence confuses is where that love came from. It came from you. The person left, and the love you felt is still yours, even if right now you don't know where to take it. Isha suggests appreciating what you had and letting it go, and then giving yourself all the love you used to give. It doesn't happen in a day: it happens each time the story comes back. In What Unification is you'll find the practice that supports that return.

Because the mind goes back, out of habit, to what it knows. Isha describes it as a groove: a relationship that ended leaves a marked path, and the mind walks it again and again with the same questions, what did I do wrong, why did they leave, what are they doing now. Thinking about it more brings no new answers, and it takes you out of your day. What helps is recognizing the moment you've entered the groove, without fighting it, and coming back to yourself with a short practice. Over time the groove gets shallower and the story shows up less. Isha works on this in How to begin letting go of attachment.

Yes, and it often comes from everything you gave. You loved a lot, you cared a lot, and the other person left: anger shows up as a way of demanding that this be seen. Isha looks at it directly in her talk on resentment: what the other person sees or doesn't see changes nothing in you, and what does change things is that you begin to appreciate yourself. Letting go of anger doesn't ask you to forgive today or to be anyone's friend. It asks you to stop carrying it. If anger is what weighs most these days, in Contained anger you'll find a practice made for that.

When the sadness holds for weeks and the basics become hard: sleeping, eating, working, looking after your children if you have them. Asking for support at that point is care, never weakness. And if there was control, violence or real fear in the relationship, or there still is, that needs specialized help and your close circle as soon as possible. Unification is a wellbeing practice and doesn't replace care from a mental health professional: they can go together, one gives you a daily tool and the other an expert space for what you're going through.