One disappointment we often face in life is the reality that some people we feel close to or cherish aren't supposed to remain in our lives. There are a variety of reasons why it happens but the reality is that it doesn't matter. What does matter is how you move forward without the people with whom you believed you were supposed to travel with through life. If it feels painful to think about them, then send them love.
Yes, that's exactly what I wrote– you saw right. Send them love.
That may feel counterintuitive when you feel so much pain (after all, it is a loss to your life) but you'll be surprised at how much better you feel because you sent them love.
And if this is someone who hurt you– yet you can't seem to let go of them despite all that hurt they caused– sending love is better than hanging on by continuing to contact them when they don't want to talk to you. Or when they cause you pain each time time you talk to them.
Finally, sending them love doesn't mean you forgive them for how they treated you or ended a relationship or whatever the story may be. Forgiveness is about freeing our own hearts to move forward. We don't control what others do, just what we do.
So next time thinking of someone brings you pain, no matter what the reasons are for that, send them love. And free yourself to move forward.