I think the guys get scared when the girls are too much emotional , especially at the beginning. If you give him some time and come up with something very casual and cool to text that would work out. I think Acting more like friends and the texts not be about the relationship like Kevin was saying in 5 steps, should work in your situation. He seems interested, but not able to handle drama & stress. I would not apologize again. You have not done anything to apologize for.