According to the 9 Aspiration Formula:
To activate love or improve current relations the sector you should activate is the southwest sector. Since the southwest is a earth sector you can add crystals such as a big slab of rose quartz or enhance it with lights and burning candles.
Usually in this sector, place things in pairs such as 2 birds such as ducks or doves. You can also burn two pinkish red candles here and place two same size quartz crystals together. This is also know as the tantric twins. Surely it will send the universe your desire to find a soul mate. Other stones of love include, rhodochosite, adventurine, jade, agates, and kunzite.
If love is the most important thing in your life, make sure you do not have bathrooms and kitchens in the southwest. Toilets in the southwest can be suppressed with plants or the five rod bamboo wind chime since wood controls earth. Place plants on top of the toilet to prevent your love life from getting flushed away literally. Kitchens in the southwest, usually is a sign occupants of the home are prone to infidelity or they themselves get cheated on. Either way it's a sure sign of bad relations.
Next Apply the 8 Mansions Formula.
Find your longevity direction. This would be a good direction to face when sitting and to head when sleeping.
Flying Star
Find the where the annual #4 is in the flying star charts. Then either sleep in that room or spend the most time there. Of course you'd be super lucky to have your bedroom there for the energies of sexuality and love are high. The Chinese do not recommend this number for married folks because it can quickly lead to the man wandering for more. Of course, for a healthy trusting relationship it can do wonders. Be discriminate to avoid heart break.
Also find the #4 in your flying star natal chart and adorn that area with love objects like pictures, love notes and books. The number 4 represents small wood, usually as paper objects.