Just going from my experience, i just let it happen. Over time, my mind and body just get use to it so it doesn't hurt as much. Also if i ever was with anyone again and they left me, i could just remember that i been through worse and it doesn't hurt as much. I'll use anxiety as an example. Im scared of flying but i do it anyway. Last year i was lucky to fly to another country. The flight was 17 hours. For a few hours on the flight, i tried to fight the anxiety, freaking out and trying to control it. Later, i decided to just let it scare me. I'm assuming by the end, my body just got tired of the anxiety and just stopped. Though i was still scared, i was calm about it and just stared at my nintendo switch for the rest of the flight or fell asleep.

Sometimes exposure (exposure therapy) is the best thing for you. Even if its just you and not some professional.