Do Not spend money for someone to cast you a spell! It's usually a scam. That email is probably vad news, I've seen a lot on this site. Trust me and stop persuing it.
Yes, I have casted spells that have worked, but getting to the point where I could sucessfully cast one took a while. I usually work with protection spells.
Now, for you, I would start with meditation and energy work. There are a lot of good beginner articles, and I could send you some if you would like. Instead of trying to make this person come back to you, you should just try to talk with them. I've found meditation work can often give you peace of mind when dealing with a stressful situation, so that may be all you need right now.