AAAAA, but Rose's bf is conflicted. And, Rose has some material already to think that he would treat her well at least in some aspects - he even treats her doggie well. This is saying something. It is unfortunate that he does not even own up, STILL AFTER ALL THIS TIME; he trivializes the problem by saying that other people have their kids from earlier relationships visit them much more frequently. He also demands sacrifices from Rose to which he is not entitled. On the other hand, he must have REALLY wanted to be with Rose to justify the omission of critical information in his mind. Had he not cared for her, he would not have bothered to concoct a story to make him look like a better candidate for her than he was in reality.

With all of that, the bf appears to be a normal human (=a conflicted person with a combination of flaws and attractive attributes) who does not qualify for the title of a "jackass".