I see you’re waiting on therapy, and once you’re able to get that, it will be a big help.  What you need to do while you’re waiting is to cut off contact with him. Completely. Resist the urge to text or call him him, to look at his social media, to read old messages, to look at photos, to ask how he’s doing, any of that. It’s likely going to be REALLY hard at first, but it’s the first step to breaking the attachment you have to him because it will allow it to weaken.

Aside from that, work on improving whatever things about yourself that you would like to improve. Take this time to do things you couldn’t when you were spending your time with him (like going back to school, learning a new hobby, etc.) If you’re feeling abandoned, read books or blogs on healing from abandonment. If you felt some codependence or lack of healthy boundaries on your part, read books and blogs on setting boundaries and self-care. Be careful with any blogs labeling people as narcissists, though, because ALL of us have narcissistic traits and very, very few people actually have narcissistic personality disorder, but by the way some of these blogs talk, everyone who emotionally hurts us has it. The danger in believing that is it allows us to pass all of the blame onto the “narcissist,” which can make us feel stuck in our anger and sadness, and it stunts healing, because in order to heal fully, you do have to accept your part in things, even if it’s just putting up with the abuse without creating and enforcing healthy boundaries. Once you figure out your part in things, you can begin to figure out what caused the behavior in order to heal the root cause. THAT is what will help you to truly and fully move on.

Like Anita, I’m also confused by that last sentence, so I’ll comment more if you’re able to clarify that for us.