Hmm.. since I don't know the circumstances of your breakup and/or what is your attitude towards it, I'm not exactly sure what songs to suggest that would best match your situation... so I'll just give you a bunch of them in general...

Being a HUGE fan of "old" Greek music, some of the first (hundreds of) breakup songs that I can think of are...

https://www.youtube.com/watch?v=QdjiCmBn...

https://www.youtube.com/watch?v=5Te5VjAz...

https://www.youtube.com/watch?v=lCsX0yTZ...

I understand that you prefer newer songs, but the old ones are really top notch x) Why not give them a chance; you might like them more than you'd expect. Age is nothing but a number; think quality!

Anyway. Here's one that is not "too" old.. (well, sort of..?)

https://www.youtube.com/watch?v=HaX8fFifWuk

...and if that's not recent enough....

https://www.youtube.com/watch?v=-u3_bKBv9h0

https://www.youtube.com/watch?v=pUPILMyf6ik

https://www.youtube.com/watch?v=_O0Ho2T5rRA

Btw, you can also look up the word "kapsoura" to get a variety of sad songs...

AND, last but not least... to lighten up the mood a little... here's a brilliantly hilarious one (if you understand Greek, that is)...

https://www.youtube.com/watch?v=Nx9FsMapmpI

Good luck with your breakup aftermath...!

Orney corny

http://www.youtube.com/watch?v=cGt7PR04q...

Sorry but the best are oldies and you have to know Greek to grasp the full depth of the lyrics.

Here are some goodies but oldies.

https://www.youtube.com/watch?v=PacEuCOM...

https://www.youtube.com/watch?v=GLWe7rNe...

https://www.youtube.com/watch?v=bjyBBF2W...

https://www.youtube.com/watch?v=ndSrCW-_OZ4

https://www.youtube.com/watch?v=Bvhp7AGwrCU

https://www.youtube.com/watch?v=BRnikexEW3Y

https://www.youtube.com/watch?v=MadFmKgyJKo

https://www.youtube.com/watch?v=WCMTYQxbppk

https://www.youtube.com/watch?v=8-zYyULwAIw

https://www.youtube.com/watch?v=ii8pDdC8AiQ