Please your advice

I was in a relationship and we broke up recently for reasons I don’t really wanna get into. There’s no chance of us getting back together, and now I’m trying to move on.

Everyone keeps telling me to “feel my feelings” and accept them, but I honestly don’t know how to do that. I’ve been trying my best to distract myself and stay busy, but then I realized maybe I’m just avoiding the grief instead of actually dealing with it.

How do you even sit with your emotions? How do you let yourself feel things without getting overwhelmed? I feel kinda lost and I’d really appreciate any advice.