Summarize the following:
Respect your friend’s decision, even if it’s painful for you. Don’t hold out hope that they’ll change their mind. It’s not possible to make someone care about you, and dwelling on the rejection will only make you feel worse. Find a close friend or family member to talk to during this process. This can help you find support and feel less lonely during this time. Find someone who is not a mutual friend of your old friend and who can provide an unbiased opinion about the situation. Remind yourself that friendships end for all kinds of reasons. Rejection is tough, but it doesn’t mean you’re a bad person or unworthy of making new friends. It just means that particular friendship wasn’t a good fit for the other person. If your self-esteem has taken a hit, take some time for yourself to recover. Work on personal projects or develop a new skill to rebuild your confidence. Socialize with positive people who are openly loving and warm toward you to remind you that you are worthy of friendship. Do not follow a former friend around or beg them to take you back. That will only irritate the person and erode your sense of self-respect. Give them their distance, and focus on moving forward with your own life. Reach out to befriend your coworkers, classmates, and other acquaintances. If you don’t know many people, consider joining a club or taking a class to meet others with similar interests as you. If you want to get to know someone better, asking them questions about themselves and inviting them to get coffee with you is a good way to start. Just don’t ask anything too personal before you know them well. You’re not a toy, so don’t let anyone treat you like one. It’s okay to accept the person’s friendship again if you want to, but don’t make them the center of your social circle, especially if they caused you weeks or months of pain.  If you realize that your friend is only coming back to you because they lost another friend or broke up with someone, you may want to consider turning down their friendship. Take a few months to think about the situation before deciding if that person is truly invested in the relationship again.

Summary:
Accept that your friend has moved on. Avoid blaming yourself. Avoid chasing the person. Make new friends. Be cautious if your former friend tries to revive the friendship.