Hi Young Hag, so you only cast the spell really only a few days ago. I have not personally cast a love spell, but I have heard from many people's experiences that they take time, especially if you are seeking to attract a very significant love in your life. A quick fling may only require waiting a few days or weeks, but a deep and lasting love (like a soulmate) may take months or even years for the spell to manifest. Magic works subtly, influencing things in unseen ways -- it takes a lot of time and work to arrange a fortuitous meeting between two people who are well-matched for love.
On the other hand, your description of your co-worker raises all kinds of red flags for me. A guy whom you didn't really have any interest before suddenly becomes very flirtatious and attentive to you, and then the moment that you start thinking you could reciprocate, he's doing it to someone else. This is a practice known as "love-bombing" -- he showers you with an overwhelming amount of affection to get you to bond with him very quickly (although his own bond towards you is not strong at all, despite his claims to the contrary). He tells you he's in love with you, he's never met anyone like you, that you're the only person who could understand him, he loves every tiny thing about you, he shares all your interests, etc. This is not the same as falling in love with someone else, because of course quick courtships do happen, but a very one-sided love bombing comes from someone who wants to exploit or abuse you (definitely an energy vampire at the very least). It's the mark of a scammer.
Love-bombing doesn't last forever, and it's very common for the love-bomber to rapidly withdraw his affections, leaving you feeling unbalanced and questioning what you did wrong. It is very common for them to apply the same tactics to someone else (this is called "triangulation"), leaving you even more confused and insecure. When you're desperate to reconnect with him, they're able to manipulate you at their whim. He may turn the charm back on if he senses that you're losing interest and moving on, starting the cycle all over again.
Bottom line is: Tread very carefully around this guy. Real love takes time to develop from both sides. This is not your spell at work; this is something else. Watch for signs of love-bombing -- it may feel great, but it's leading towards something bad.
~ Xiao Rong ~ 小蓉 ~ Little Lotus ~