Article in English: There are are a variety of reasons for  not  becoming friends with an ex-boyfriend. He may still have his heart set on you - in this case, hanging out with him as a mere friend is cruel. The opposite may be true - if you're still into him, you'll be setting yourself up for disappointment. Finally, your breakup may have been because of something so serious that it's impossible to look at each other without resentment. If either of you has been deeply hurt, give each other a wide berth. Even if he's calm, emotionally stable, and your history doesn't contain any gaping wounds, you simply might not want to see your ex again. This is  fine.  Exes don't necessarily have to be friends. Even the cleanest breakups can be the cause of hard feelings for both parties. Immediately after a breakup, there's a chance he'll be sad or angry. This is no time to approach him as a friend. Wait for his emotional waters to settle before proceeding.  Similarly, listen to your own heart. If you've still got lingering anger or you're a little depressed, give yourself some time to settle before you make contact.  The length of time you spend apart from each other after a breakup will likely depend on the circumstances of the breakup itself. "Messier" breakups can require months or even years before your feelings have calmed to the point where a normal, friendly relationship is possible. The period after a breakup is a great opportunity for reflection and self-improvement. After you've given your emotions some time to normalize, spend the time you previously spent with your boyfriend on yourself instead. Devote yourself to your hobbies or schoolwork. Spend time learning a new skill. Do things you like to do, alone or with friends. By improving yourself, you're also restoring your self-confidence and your sense of self-reliance, which will make it much easier to start new friendships (and, coincidentally, romances.) After a few weeks of self-improvement, you may find that you don't even think about your ex anymore! This will make it much...

Summary in Indonesian:
Sadari bahwa tidak semua mantan bisa dijadikan teman. Beri dia waktu. Lakukan sesuatu untuk diri Anda sendiri. Buat kontak.