Feelings which are actually "unrequited" are more commonly caused when one person has STRONG connections to a personal planet (often Venus), while the other person has NO or very few connections to the same planet. So if person A has strong connections to the other's Venus (relationships) and person B doesn't, then person A feels a strong relationship with person B...and person B may not know person A exists!
In synastry everything is from the point of view of the "house person". So, with that simpler way to see things, let's go to your example.
Planet person's Venus (relationships) falls in House person's 5th house (self-expression_r_r, also dating). House person feels the Planet person wants to date them. Planet person's Venus falls in their own 5th house so they naturally use their Venus in a "dating" way. So in this example the house focus for both people are the same and there is no possible confusion about "relationships"...BOTH think of them as "dating".
Planet person's Venus falls in House person's 1rst house (being, also action). House person feels Planet person wants to be actively in a relationship. Planet person's Venus falls in their own 1rst house so they naturally use their own Venus in an "active" way. So in this example the house focus for both people are the same and there is no possible confusion about "relationships"...BOTH think of them as "active".
In this example, each person understands the relationship energy of the OTHER person correctly: an interest in dating relationships is an interest in dating relationships, and an interest in active relationships is an interest in active relationships.
Your next example is simpler. Planet person's Mars (being, also action, anger) falls in House person's 7th house (relationships). So each person thinks the OTHER person is interested in being active in relationships. What is missing is where Mars is in each person's charts. If either person's Mars is anyplace other than the 7th house, then misunderstandings can occur between what one person feels a person is doing (Mars) in the relationship and what another person is actually doing.
Jupiter conjunct north node:
The Jupiter person makes it easier for the Node person to grow and expand their horizons; the Node person brings out the best in the Jupiter person's attitude, usually drawing out the philosopher or teacher in the person.
海王星合南交点
海王星人容易使南交点人迷失方向,而交点人会引出对方的不良的海王星的特质,如过度的梦幻,或者逃避现实.
eros conjunct south node:
This can be an aspect where there is some unhealthy lust coloring the relationship, which can (if the rest of chart backs this up), keep the relationship from growing on healthy terms.
婚神星合火星
这一相位要根据性别来判断.如果婚神星人是女性,火星人为男性,二人之间的吸引力很强,但是如果婚神星人想要在关系中掌控,可能会导致争吵和磨擦.如果婚神星人是男性,那么就会认为对方符合自己心目中配偶的形象,并且不由自主的被吸引,想要引起对方的注意,但是有时候会被对方的那种过强的主张所压制.
chiron oppose psyche:
This is usually a case where the couple's finding each other is to help heal them both from wounds. The Chiron person has long-standing wounds, perhaps going back to childhood, while the Psyche person is hurting deeply from a past relationship. It can at times be painful as they both may have to relive the past to heal, but the healing also strengthens the relationship.
chiron trine psyche:
This is similar to the previous aspect, except that the healing takes place more easily, and is more incidental to the relationship. This is not a strong enough aspect to bring the people together in the first place.
eros trine psyche:
In mythology, eros and psyche finding each other is a metaphor for the soul (psyche) finding what it desires most (eros). This is a minor aspect, showing that there is some harmony where the couple fulfills each others' desires. But again, it is not a strong enough aspect to draw the people together in the first place.
eros trine neptune:
There is a slight quality to the relationship of it being something more, something almost spiritual. Definitely a minor aspect, but could give the couple a feeling that they knew each other before they even met in this life.
eros trine pluto:
If there are other aspects showing attraction between the couple, this
Basically like eros trine psyche, except that they each must put a little effort into fulfilling the desires of the other, rather than it just happening naturally.