Rejection is something we are afraid of and it leaves us all devastated and hurt. But it doesn't mean that your life is ended. You've got many things to do, many dreams to make them come true and it will happen when you'll move on. I'll tell you how :
1) Try to forget it - I know it's difficult but NOT impossible. If he/she rejected you, it's their loss not yours. You deserve better. Keep your chin up and be confident like you were before. Don't let anyone shatter your confidence and self esteem.
2) Find someone to like - This thing worked for me. You can start liking someone if you think they are the one, but don't be too desperate. This may help you to forget them.
3) Put on your earphones and enjoy the music - Try not to listen some crazy in love songs or it will remind you of him/her and make you sad again. Try to listen some inspirational songs.
4) Create a hobby - Do what you love or join a hobby class. It could be dancing, singing, playing an instrument, jogging and exercise or maybe yoga or meditation for inner peace.
5) Give yourself a makeover - It can be an awesome hairstyle you always wanted or maybe a funky tattoo. Try new variety of clothes.
6) Cry it out - Let all your feelings out. So next time you won't cry too much for the same thing.
7) Go out - it doesn't mean you have to go out with someone special. It could be your close friends or your family. If you don't have anyone, go out alone. This way you'll have some ME time.
8) Write, write and write - Let it be a song, poem or a diary entry.
9) Share your feelings with a trusted friend or a family member - Trust me, it helps.
10) Time heals - You can't get over it just overnight. It will take time and you'll start to feel better.
These were my suggestions, what about you? Share you experiences in comments.