Divorce Support Forums: moving out of state with my son

hello, i am a 21 year old father with a 3 year old beautiful son named austin, his mother and i split a year ago, we were unmarried but we agreed that we would not go through the court system to decide what was best for our child we then agrred on an arrangement where she has him 4 days of the week and i have him 3days that same week then it rotates evry week there after. i am from az melissa and i met in AZ austin was born in arizona we have lived here for almost 3 years, my question is what are my options to move back to AZ with my son so it affects him in the least way, by all mean she is a good mother and i do not want to take austin from her, but at the same time i do not want him to grow up not knowing his family on my side besides az is my home, what are my options?