What did I do wrong?

My boyfriend an I have been best friends for 29 yrs, we have been together for almost a yr, an the past 3 months have been rocky, been working through them, well I thought we were but he still had a problem, now he left am won't answer my calls..4 days later he comes back, says it's my attitude an tone on how I say things, said it's been going on for a few years, an that I need to get help. Gives me a month to change. So now he left again, a week an half later, last comes back we talk. I cry, he cries.. he says he loves me..today he calls, see how day is going, light conversation about work, asked him since he sat an listened to me talk wed night, an if he didn't have anything pressing to do, I would like to talk an me be supportive an listen to what he would like or has to say. Said he would call me later, nothing, never called, I called rings till voice-mail picks up. Like he vanished again... I've replayed the past 2 nights, figure our if something I said wrong, but nothing... I'm lost an can't figure out or why?