You do not have to solve every emotion; sometimes understanding it is enough.

Not every inner state is a problem awaiting a fix. Some grief, some restlessness, some ache about a road you did not take will not resolve into anything, and treating them as malfunctions to be corrected adds frustration on top of what was already there. Knowing where a feeling comes from and what it is about can be a complete and sufficient outcome.

When something persists, try switching the question from how do I make this stop to what is this. Follow it until it makes sense, then let it be. You may find that the weight lightens simply from being understood, and if it does not, at least you are no longer failing at a task that was never possible.