1. The timing is right. There must be (ideally, both) a willingness to fall in love with another person.
2. Similarity. It is no secret that people sympathize with those who are similar to themselves, not only externally, but also internally - they have similar interests, hobbies, and attachments.
3. Early attachment style. It depends on the personal characteristics of each person. A calm, balanced person is more capable of long-term relationships than an impulsive and impetuous one.
Everyone strives to understand the nature of love, but at present it is unlikely that any of us will be able to answer the question of why and how this feeling appears. But the phenomenon of love certainly needs to be studied. After all, if you understand the patterns of this feeling, then the reasons for unsuccessful relationships, which can be avoided in the future, will also become clear.