My format is a bit different to yours as you know (check post 3). I would ask guidance/protection of quarter entities during, or just after I've cast the circle. Then the presiding Deity is called once inside the complete circle. (And to be precise here ala Chaosbloom - the word is evoke, i.e. "call them into the circle". Invoke means "calling them into your body".).
By habit - I always start casting in the North (many start casting in the East - the place of
the rising sun). For the purpose of focussing on water (Love) - I'd set up the altar/cards in the West and sit facing the West.
What Love Deity would you choose?
I would choose Isis (love, faithfulness and devotion enduring past death - as she put Osiris back together again and brought him back from death. I'd avoid Aphrodite/Venus as She is more lust/desire, and beauty - than enduring love). I might choose a card to represent her... Temperance. Or The Star.
As I invite Isis to lend her energy to the ritual, I place her card down. 1).
Below that I would then place in a line:
2) the card that I choose as me - my Signifier... usually Page/Princess of Pentacles
3) the 2 of Cups in the middle for a romantic connection,
4) the card that represents the person I'd like to attract (could be more than one card if I'm thinking of particular attributes combined together. Here I'd then group the cards piled together. OR a card from a specific deck simply because of what the particular imagery says to me),
and 5) The 10 of Cups (outcome).
In pre-preparation, I may have already written a short chant to acknowledge and invite Isis in, and one that
I can repeat over as I lay down the rest of the cards.
*And here, thinking up some chants off the top-of-my head...
Isis: "Maiden of the Earth and Sky, Mother of magic, Crone of wisdom and strength. Isis, I call you here. May your tears wash clean all obstacles towards my goal!" (tears - is a reference to how the flooding nile was viewed as Isis's tears for Osiris).
Cards 2-5: 2) "Here I stand open to opportunity," 3) "...Seeking a true bond of love and understanding." 3) "May my partner step forward in freedom." 4) "May we meet and forge the perfect interface/way ahead."*
Then meditate on /visualise the outcome as already attained. Or draw it in sigil form/write it down on a small piece of paper and burn to cinders in a bowl (the intent/hope floating "out to the Universe" as smoke).
Stack the cards up.
Thank and say farewell to the Deity and whatever quarter entities were called (here blow out the candle(s) if there was one).
State that the circle is open (and/or de-contruct it anti-clockwise - or the opposite direction from the way in which it was drawn).
Tidy stuff away.