How do you regain your strength back after being rejected/blocked by someone you have feelings for?

Anonymous
Long story short, a guy initially showed interest in me, said he wanted to get to know me, and we texted back and forth for a while. He eventually began to lose interest in me since he took days to respond back to me. I noticed this and asked him if he was interested in me as in considering being in a relationship with me and he later replied saying that he was "too busy" to get to know me. I eventually asked him if he still wanted to be friends and he said "of course". I even asked him if I could add him on Facebook and he did. He texted me back on forth on that very same day he added me. 24 hours later, I check my Facebook page and noticed that he deleted me and blocked my number.
I am so depressed right now because I feel as if I did everything right and every time I meet someone I like, I always end up getting hurt one way or another. I keep wondering why he changed his mind so quickly about me. I don't even have the desire to live right now. How can I regain my strength and ego back?
How do you regain your strength back after being rejected/blocked by someone you have feelings for?
22 Opinion