You may feel that being nice means always telling your friend how to fix his or her problems. However, this can make the friendship feel unbalanced. You're always the one with the answers, while your friend is always the one with the problems. Not only this, when your friend opens up to you, he or she may not always be seeking advice. Sometimes, people just want to vent and do not want guidance.  Simply let your friend talk. Show you're listening by giving non-verbal cues, like smiling and nodding, to convey you're paying attention. Reiterate what she's saying on occasion to make sure you understood fully. You should also help your friend bounce ideas off of you. Ask questions like, "What do you think you're going to do?" or "Do you have any idea how to proceed?" In the event you're genuinely worried about a decision your friend is making, it's okay to voice your concern. If your friend is considering doing something dangerous or illegal, for example, it's not a bad idea to express concern. A nice friend does not make people feel a debt. You should not hold onto things like who gave the best birthday present or who did the last favor. You should do nice things for your friend because you appreciate this person, not as a way to get favors in return.  People often create petty barriers to friendship. For example, you may feel like you shouldn't invite your friend out on a Saturday night because you did so last week. In your mind, it's your friend's turn. However, some people just aren't great at making plans and prefer to simply go along with what others are doing. Your friend does not owe you an invitation because you extended one to him or her. Try to keep in mind you and your friend have different strengths. You may feel like you're always the one hosting events, for example, but maybe your friend is always the one willing to bring over cookies and help with the clean-up. Being a good friend means you sometimes have to dish out harsh truths. You're not being nice by allowing a friend to repeat the same...

TL;DR in Indonesian:
Hindari memberi nasihat. Jangan perhitungan. Katakan bila dia salah. Atasi konflik secara dewasa.