I took him back

I dated John for two years before he broke up with me out of nowhere. We had been fine before. I loved him more than anything and everything in my life. When he was gone I was seriously sick. The depression was killing me. I had never been so consumed by darkness. And then one day, he showed up, saying all the right things, and I couldn't say no. Its been several months since he came back and I don't think I've developed an ounce of trust in him. We've been amazing, better than ever, but I am constantly worried I'll lose him again. The anxiety is making me bitter and difficult. I am losing my mind all over again and fear that I'm going to push him away again because I can't trust him. Please, someone tell me this will go away, that l can trust him not to leave again?

Has he proposed? That is the ultimate question.