Just broke up with my 4 year relationship

Just ended a 4 year relationship with my boyfriend that I didn't want to end. The reason I ended was because he is really childish and he couldn't get or keep a job even though I had a job lined up at my up job. He just didn't take it because he thought it would be to hard. I have been supporting both of us for the last 4 years and I couldn't take the stress of it as anymore. I can't stop thinking about him and I miss him so much it has been so hard living on my own since we have lived together for almost 4 years.