As a Libran Astrologer, a lot of my mental space goes towards relationships, ah. I already wrote a general blog post about the typical markers of new relationships by transit, but today I've decided to use my own personal experience and observations to detail up what kind of transits one can expect when meeting someone's of interest. Here are my observations, based solely on my personal chart and the transits that were occurring at the start of the relationship.
At the beginning of every long-term relationships I have had, Juno was most commonly exact sextile Venus, and seldom conjunct/sextile Sun. What I found to be surprising though, is that when I looked up the transits during which the relationship broke down, I also noticed a high occurrence of Juno in aspect to Sun. This tells me that Juno seems to time beginnings and endings when in relation to Sun, whereas Juno-Venus is only found in promising beginnings, in my personal experience.
2/ Ascendant & chart ruler
For every important relationship, North node was either in aspect to my Ascendant, or my Ascendant ruler. An important information to note though is that my Ascendant ruler is in my 8th house conjunct Venus, so it does give it a natural inclination towards signifying relationships. This note aside, for every important relationship, I either had North node conjunct AS, square AS, or opposite chart ruler.
3/ Moon and ruler of 4th house
I happen to have Moon and ruler of the 4th house conjunct, so it's quite impossible to differentiate. For every long term relationship, Saturn was either conjunct or sextile Moon & ruler of the 4th house. One relationship did not feature this aspect, however Uranus was opposite Moon and ruler of 4th, which happened to be a very accurate description of the relationship: Very on and off!
Chiron was prominent in all relationships by transit, once trine Sun, once opposite Venus, and once square Ascendant. By far the best relationship was the one that started on the opposition to natal Venus while indeed the most painful AND healing one was the one that started on Chiron square Ascendant.
Jupiter was triggered in every long-term relationship. Granted, Jupiter is my chart ruler and is located in the 8th house so again, this isn't necessarily a rule that can be extended to any chart. By transit, long term relationships started under the transits of South node to Jupiter, Pluto trine Jupiter, Jupiter trine Jupiter, Jupiter square Ascendant, and Uranus trine Jupiter.