That will never leave me.
I'm blessed (or cursed) with the ability to care about someone no matter what. I still care about my old best friend, who decided I wasn't good enough for him anymore one day.

It can be a huge hassle at times. Wanting to let go but not being able to.
The other guy my age (just a year or two younger) I fell in love with, I never really got to have a real talk with him. Now we kind of fell out of contact (like, it's impossible TO contact him) and I wonder about him, every night.

I hope to use it someday.