If you understand the principles of magic and the basics then yea, do your love spell.
Do as you will, and be prepared to deal with consequences. If the consequences are that there is more love in the world, even if it is your little corner of the world...then go for it.
Seriously...you do it!
All the free will arguments are fine but free will is altered every day all day in a million ways ...like advertising...the argument doesnt hold water...as long as youre prepared for the consequences.
One thing though...please...whatever you do ...do not pay anyone for spell work. The internet and RL is full of charlatans on the look out just for you!! Dont pay anyone a thin dime, they are ripping you off if they make promises you want to hear.
For whatever its worth, im sorry youre going through all this. If you are emotionally upset then probably not a good time for doing magic and spells. But i know how it feels inside and the feeling of being bereft is really terrible. I hope you get through it ok.
I really hope it works out for you and you make who ever that guy is the happiest person in the world and that you give all of yourself to him...and that he is worth it. Thats what love is...you are willing to give that much and trust the other person will give back. Well, one way of looking at it i guess ; )