my ex propose and then he took it back when we had issues. but years later i found out that he was young immature, his friends told him that he could do better, he had prettier girlfrieds, he's settling. his friends tried to get him to go to nude bars, ect.
he probably found someone he's more interested in. some guys loose interest fast. if your young you can wait for the man to treat you like a princess, and love you forever, and cherish your feelings.