The method is as follows:
1. Slow down. Calm down first and assess the situation.
2. Make sure you are serious.
3. The purpose must be sincere. Don't just say "I love you" to others just to get them to pay more attention to you.
4. Take your time. If you're not sure, try something lighter first.
5. Be bold. Life is so short and love is so beautiful. If you like someone, it's very likely that they don't like you, or they may like you now but not later. No matter what, this is how you feel in your heart and cannot be ignored. Sometimes, the only option is to move forward, even if you are afraid.