Moving states for a relationship!!!!?

Ok y'all I need opinions and advice! I am a 21 year old mother of an 8month old baby girl and a sophomore in college. I recently ended a 4 year relationship with my now ex fiancé and have reconnected with and old friend I haven't seen in years!!! We have grown very close in a short time, but he stays in Texas and I'm in Colorado..... I visited him for a week and loved it but he wants me to move in with him at the beginning of the new semester. I want to but I'm so worried and I keep going back and forth. I can't make my mind up and I already told him I was coming.... what should I do?