I have a question, how do you know if someone is really working on them-self or pretending/faking?

The reason why I am asking,is because my H says that he is reflecting on himself and trying to be a better person. Well the last time we separated, he said the same thing and I let him move back in and that change lasted a few weeks. So, how would I know if he is being real about it? I'm not ready for him to move back, yet.


H: 49
W: 47
D: 6
M: 6 1/2 yrs
H: Bomb #1 6-2010
H: Bomb #2 7-2011
H: Separated: 7-11-11
Reconciling 2-2012
Separated: 1-31-15 (I asked him to move out)