I’m not sure that I agree that he went from relationship to relationship so quickly. You may have thought that the reason you weren’t seeing him so often was because of his lack of money or whatever but maybe the real reason is that he was seeing this other woman. For all you know, that relationship may have been going on for years. As to what you were thinking, I’m not sure. Long-distance relationships are always problematic. If it’s for a set period, that’s one thing. But your long-distance relationship seemed open ended. That was the relationship’s Achilles heel. He was tired of not being able to see you regularly and so someone else entered his life who was more accessible. Clearly he was looking for a committed relationship, thought he’d found it with you, but when it wasn’t coming together, he moved on. I’d recommend staying away from men who don’t live close by, but if you do get into that situation again, make sure it’s only for a brief time.