Should I leave?? Should I call his bluff??

I have been married for about 2 1/2 years. Sometimes it is great other times not so great. Since I have been married my husband has told that he wants a divorce more times than I can remember. He will also tell me that he wants me to move out. Usually, a couple of days after this big blow up he decides that he didnt mean any of it and he doesnt want me to leave. So this happen again about two weeks ago and he told me that he wanted me to leave and he wanted a divorce again, but this time he started to "help" me pack...and he said that he was serious this time. So on monday I found an apartment that I can move into and finished packing this week, and I plan on moving on this weekend. Well last night he told he didn't want me to go and he wants to keep trying. I don't know what to do?? Part of me wants to leave, but then I'm afraid to be on my own again. I feel like if I stay he will just do this again in a couple of months.