The following behaviors are considered ambiguous: opposite sex friends send morning and night messages every day, share water bottles, become familiar with each other's social circles, and give gifts on special holidays.
1. Send each other morning and night every day
Occasional good morning and good night may not represent anything, but if we say good morning and good night to each other every day, this relationship becomes more ambiguous. After all, ordinary friends don't have to start chatting with you every morning as soon as they wake up, and even report to you before going to bed at night.
2. Sharing a water cup
The water cup itself is a very personal item. If you don't mind the other person drinking the water cup you have drunk or naturally drinking his/her water when you go out to play or eat together, then this relationship is already quite ambiguous.
3. Frequently participate in each other's social activities
Usually, we only introduce important people to our friends. If you often participate in each other's social circle activities together, get to know each other's best friends or even family, it proves that you consider each other important and can further develop your relationship.
4. Giving gifts on special holidays
If giving gifts on birthdays and New Year's Day is an emotional connection between friends, then giving gifts on Valentine's Day, 520, Qixi Day, which have obvious love attributes, must be an expression of ambiguity between the opposite sex.