You want to save your relationship? Don't try to casting over him, try talking. When was the last time you went on a 'date night'? After so many years relationships become routine, one or both partners get bored and fall out of love. Try injecting some romance and alone time into your relationship [and by alone time I don't mean the bedroom, that could help, but I mean the two of you talking without distractions] think about when you first started going out, what has changed? If you don't send the occasional 'love you' text randomly anymore, you'd be surprised how this little something helps. Of course, even in relationships, we need space, so don't think the worst.
Now, regarding magick, study magick first. You can't change a transmission without learning how. Magicks the same. We could give you a chant, but if you don't know what you're doing you're just reading from a piece of paper.