That describes the weird texting tango I did with my ex this summer. He tries to get back together all "All the moments we had were special", "I'll always be glad that I met you." A few days later, "Let's just be friends." Then the boy immediately goes MIA.
On some level, I wish American society was a little more structured socially. It seems like as the 20th century wore on, structured forms of socialization like being introduced by your family to partners, or going to finishing schools, just disappeared. Sure, not everything about that stuff was great, but it would have been nice for easily learned, concrete social strategies to be normal again. 21st century America values spontaneity and individualism, which is all well and good but has its own pitfalls.
He's playing a game - a dirty little game too - please, don't be hurt. You are better than him but he's using you for an ego boost when things don't go well with other women. If he goes mia and never tries again, it's actually better and counts as a break-up. I LET a guy string me along over a four year period until my uncle scared the crap out of him and he left permanently. My uncle recognized what he was doing right away and forced him OUT of my life. My uncle died last year and I will always be thankful for what he did for me back in 1990. Don't give a guy PERMISSION to mess you around.