Situation with ex...really need some advice?!?

We broke up. I thought it was over, we didn't speak for 6 months. Got an emailed apology saying that he hit rock bottom and it helped him realize all of this stuff, etc. Suffice it to say, we started talking again, started seeing each other again. A few weeks later he says he's too busy with work and while he cares for me a lot and wants to commit to me he can't due to the desire to make it as an artist and photographer. He says he can be a good friend to me but not a bf at this time and that his mom even feels ignored because he is too busy to talk to her. I told him to really think about it, that I wasn't asking a lot, just communication, affection and honesty when he can give it. I'm an independent person, not needy at all.

Two weeks go by and I didn't hear from him at all. I sent him an email asking for him to at least call me so we can resolve this, either choosing to not speak again or try to work it out and at least have the respect this time to let me know what he is thinking. That it would mean a lot to me. He says he will call on a specific date. That day he texts and says he's really busy and because he wants to give me his undivided attention he wants to call another day. Well, we arranged a day to speak on the phone about all of this (Saturday) because we both had things going on and wanted to take time to focus on this as it was an important conversation. On Saturday he doesn't call all day. I had plans with friends that evening so when midnight rolls around I send him a sarcastic text saying, "thanks for calling." He responded with a text saying that he "just got home, was really busy and that he was just about to text me, but I texted him first." I responded with "hrm.." and he responded with "you don't have to believe me." To which I replied: "A man's only as good as his word." And he responded with "okay." That was all. Haven't heard from him since. Anyone have any objective insight into whats going on? I really care about this guy and want it to work out..don't know what to do anymore. He hasn't responded to two of my other texts recently...

P.S. This is my brother's account. He has all the points to use! :)

Thanks!