Ex Calls me

Hello, me and my ex broke up 6 weeks ago. We never contact each other. We broke up because last month i had a big problem and I admit, I was very stressed those weeks. I was messed up. He told me we have to end things because he can't afford to have so much stress in his life.

Today, i received a call from him. He told me he missed me and that he made a mistake. He said that it was his fears that made things difficult in our relationship. Now he realizes he wants me back and wants to do things with me, be with me without any fears.

What should I do?