What does he want?

My ex fiance who left me 6 months ago after saying he did not love me enough, heard that I had moved on through friends. Knowing that, he sent me a registered letter on valentine’s day saying he loves me and misses me. When I called to talk about it, he said he did not want to get back right now and wanted me to move on and if he comes back , he comes back but he does not want to be guilty of keeping me waiting on him! He has gone on 2 dates to help himself to move on but has felt awkward and stopped it.
What does this all mean? Why sending me a letter that he loves me and misses me on Valentine’s day if he does not want us back together? Is this all game? He is in his late 30s.