When someone of the opposite sex asks you to be your friend, it often does not mean that the other person has any inappropriate thoughts. In fact, in some cases, the opposite sex may want to be friends with you simply because they want to have more friends. Therefore, when you notice that the opposite sex wants to establish a friendship with you, you should give them enough understanding and trust, and don't be too sensitive or overthink.
There is no exact time or condition for making friends with the opposite sex. This usually needs to be decided according to the actual situation. If you have known someone of the opposite sex for a while and feel comfortable with this person and there are no overly sensitive topics, then becoming friends with them is a very normal thing. On the contrary, if a stranger of the opposite sex is too enthusiastic about you, has obvious sexual implications that are unacceptable to you, or has serious differences in core values, then you may need to consider whether it is worth establishing a friendship with him or her.
Establishing friendship with the opposite sex is one of the most difficult decisions to make, which requires you to learn a skill: communication skills. When chatting with friends of the opposite sex, avoid excessive sexual innuendos and in-depth intimate topics. At the same time, when dealing with issues such as aesthetics and gender differences, we must give due consideration to differences and achieve mutual understanding and tolerance. If you're trying to develop a friendship with someone of the opposite sex, put aside your doubts and try to trust them. It's likely to be a win-win.