Sometimes when I think back I feel bad. Was I wrong for abandoning my ex boyfriend?

Sometime in the past their was a guy that I met. I like how he looked and our personalities went together well too. He was a nice and charming guy. We got along well. He even helped me through certain bad times I was going through. The problem started when he told me his problem. He told me that things got to a point when he has to be real with me. He said that he has three kids by three different mothers. He said that he used to work a job, but unfortunately he got laid off. Now he is backed up on child support and he is at a serious risk of going to jail. He asked if he could live with me and stay at my place of residence for a little while, so that he could save money to pay it off. I felt I didn’t know him long enough for that so I told him no. He got a bit annoyed with me and tried to make me feel bad. He told me that he saved my life. (Actually he didn’t. He did make me feel better when I was going through a rough emotional time in my life, but I would’ve gotten through it on my own eventually. He just sped up the process.) Later on I found out that he went to jail. Sometimes I think I should have helped. My conscious isn’t clear.