I'm really anxious about it, I should be flying out tomorrow evening but there's a bit of a back story.

In the beginning of November, my long distance American boyfriend drove to Canada to pick me up as we planned for me to stay with him over the holidays. In total it would be a two month vacation for me. Not thinking I could take this long of a leave of absence from my full time job, I quit before leaving. I was ill informed of what to bring with me to the border, we were crossing by land. Of course I was refused entry to the USA due to lack of ties to Canada.

My customs officer was the best, he told me to bring additional information with me the next time proving I had ties to Canada. Because I had quit my job and lived with my parents (I'm only 21) he said they viewed it essentially as me being unemployed and homeless because I couldn't prove otherwise.

Now, tomorrow I have booked a flight to the USA. I'm bringing with me a letter from my employer stating that I was re-hired as part time in the weeks before leaving and am taking a leave of absence until January 11th at which time I will be given back my full time position. I have bank statements and a pay check proving my full time hours. The flight is a round trip flight and I have enough american currency to support myself during my trip. Still, I'm worried that my previous refusal and the length of my trip will have me turned around at customs again.

Are there any experienced travelers who can ease my worries or give me some sort of likelihood of being allowed in the states? After being refused once I'm paranoid I won't be allowed in even with proof of ties to Canada, a return ticket, and my american currency. Is there anything else I can bring to prove my ties to Canada?