Many people have friends of the opposite sex and their friendship is very good. This kind of friendship is usually based on mutual respect, trust and common interests, not on sexual attraction or romantic feelings. In this relationship, both sides can clearly distinguish each other's boundaries and support and respect each other's lives and decisions.
However, sometimes friendship may become a romantic or sexual relationship. This usually happens when one of the two parties begins to feel romantic or sexually attracted to the other, or when an atmosphere of tension or sexual attraction is created in a friendly relationship. Therefore, when establishing heterosexual friendship, we must keep clear boundaries and respect each other's feelings, so as to prevent the friendship from developing into an unpredictable relationship.