I may be biased but I can understand why Noa did what she did. I used to do the same, all the crying and begging. You can't think straight when you were hurt, especially it is a relationship you invested a lot of time and effort in.
On the topic that he said he did not cheat and the fact that he has no choice but to break up because he likes someone else, they are all excuses and like in a comment said below, he is taking the easy way out. True that they should break up but he doesn't have to cut her off and thinking a short 'I am liking somebody else' explanation can solve anything. Selfish to the core, and when you are selfish in a relationship, you are just awful.