If "he" is your love interest, you don't look to the fifth from the seventh to see if he has a girlfriend. His girlfriend, if he has one, would be the seventh from the seventh, because she's his love interest, which would make her the first house, which would give her the same significator as you. Way too confusing. Perhaps for that reason, that's not how that type of question is read.
If you're asking this question because you want to know if he's available for a relationship with you, then your real question is, is he available to me? If he is, there should be an applying aspect between your significators, with nothing in the way. Or perhaps a translation of light: your significators don't aspect each other but there's a third planet in the process of aspecting both of them.
If he isn't available because he's with someone else, his significator would be aspecting something else, along with other signs that point to a no, not available. The other planet aspecting his significator could indicate a girlfriend. Doesn't matter which house ruler it is.
Thank you for your reply, appreciate it.
He isn’t a love interest. Not anymore. He is my ex bf. I don’t have interest in being with him myself.
There are many reasons why I want to know this answer.
So in this case, how would I go about working this out? Mars ruler of my 1st or his potential gf’s first. Or if there is a love interest, then Libra is his “5H” so would also be Venus for them both. There is no aspect between Mars & Venus. However Mars is in Venus’s exaltation of Pisces (on the IC) & Venus is in Mars exaltation, Aries sitting in 4H (or domicile?)
However currently Venus is in detriment in Aries. Venus squares the Moon in Gemini (funny, my natal moon) 8H. Sextile Mercury in 7H his “1H”. Lastly, sun & Uranus exact conj (combust?) in 6H/“his12H”
Saturn is in domicile Aquarius.
Am I right in thinking there is someone, but it’s not serious or he isn’t serious about her?
Love interests are always represented by the seventh house in horary. Never the fifth. If the question is about the querent's love interest, it's the seventh house of the horary chart, and if it's about someone else's love interest, actual or potential, it's the seventh house from whichever house represents the someone else.So in this case, how would I go about working this out? Mars ruler of my 1st or his potential gf’s first. Or if there is a love interest, then Libra is his “5H” so would also be Venus for them both.
So how do you characterize your ex? Is he a friend?
If so, we use the 11th for him.
If not a friend, then why do you care?
I asked “does he have a gf?” And the 7H is ruled by Venus (Taurus) & the 5H from that is Libra, so also ruled by Taurus. Venus is in Aries in a Pisces ruled 4H. Jupiter is in 4H too
I am fairly new to horary, however how do I work this out?