I used location services to tell if my ex was lying
Why use location services on your ex?
I think she was cheating on me.
You should not spy on others. It is a nasty habit that reveals you distrust them. If the spying is exposed, it could ruin the relationship.
I bet she was doing something nasty. I just wanted to know if it was true.
Well was it true? It is probably best to delete the tracking program and drop this. I think you should be open and tell her you are worried she might be cheating on you, at least you can get it off your chest.