I just tried casting a love spell and regret my decision...now what?

I would suggest you stop messing around with witchcraft; which is what casting a spell is. Both white witchcraft and black witchcraft ( white magic or black magic ) are both rooted in Satan, and you will only be deceived if it did work. Romans 10:8-10 is how you, or anyone else, can be born again; and you will be delivered from witchcraft.