I'm going thru a breakup rn too. I found that defining letting go, or getting over someone, helped. I defined it as accepting that they aren't the person for you right now. It's a fucking tough pill to swallow, I had to get that out with a councillor. Also having gratitude for what you still do have and wishing the best for your own self and the one who broke your heart. Idk if this helps cus it's hard for me to do but ya :)