Welcome, @brisan
Good question! 
A sugar binding spell is what we would consider a “grey area” especially for those of us who follow the Wiccan Rede, although not everyone here goes by it.
In my personal opinion, if your intentions were positive (e.g. healing a relationship, not manipulating) then you have nothing to worry about.
I recently replied to a similar question about staying safe when casting spells . I’ll paste it here:
Most of the time, a ritual can’t “backfire”. It either works or it doesn’t. But the best protection spell is to keep learning. The more you learn, the less you fear.
Protection spells are available to those who might be dealing with baneful magic or don’t have enough confidence, so they feel a specific need for an extra layer of protection.
You don’t have to cast a circle every time you cast a spell. The circle will give you confidence and a place to practice without distractions, but it’s not always necessary. Think of it as a “safe space”, your training wheels. Eventually you don’t really need it and it’s also good to experiment without it.