When you are regretting a break up you can only do two things. One, try to get back with the person or two, try to get over it and come to peace with the breakup.
Moving Up - 2005 Regretting Arizona 3-2 was released on: USA: 22 March 2008
He punched the wall, already regretting his decision.
It means that the person has done something in his younger years that is regretting.
regretting
regretting
A dying person is looking back on their life regretting how they acted and regretting what became of them.
Regretting. The present participle of a verb is always verb + ing
I hope she's not regretting the choice she made;she'll eventually become depressed.
Don't go out with him. Even though you may enjoy it while it lasts, you will end up seriously regretting it!
ruing
Making out at the most. If you start doing more you will end up regretting it. Trust me
I believe it's ok to still like an ex. It doesn't matter if you're the one to break up with him/her or you're the one that got dumped. If you're the one that broke up with the person you could have thought differently afterwards after you actually did it, realizing what you did and regretting it. So I think it's perfectly ok to still like an ex.