depends on the type of breakup, your reasons to breakup, and the phase of the breakup you are in
here's a "meh. I guess i'm kinda finally getting over the 8 year relationship that I fucked up entirely leading her to breakup a week ago" song:
here's a song for when the breakup makes you realize you that put way too much of your happiness into a single person, so when she broke up you stared into an abyss of loneliness and had no friends to talk to, and now you're making deep, meaningful changes to your life:
Since I Left You always helped me after a breakup. i kinda need something happy to distract me, get me on my feet again. you're not me, though, you might need something to think to, or something sad to dwell on those feelings and let it out.
An obvious one: https://www.youtube.com/watch?v=x_PrT25o8Vs
for when you broke up cause you werent ready for long term commitment, therefore your relationship was shitty: https://www.youtube.com/watch?v=r8NZa9wYZ_U
>I broke up with her
Say no more