What's your purpose for the love spell?
Building from your basics will help you and your casting. Meditation, grounding, centering, sheilding, ect. will help support you and your spell casting. If you haven't started studying and building from your basics, then this may be why your spells are not taking effect.
Having someone love you is against someone's will. This is fabricated love.
Try casting spells or preforming rituals to draw love closer to you, or have it come to you. Rather than making someone love you.