Ive been with my boyfriend around a year, both middle aged divorced, dont live together. Recently he has started acting differently, this follows a brief period where we split up (my decision to split, then my decision/both decided to try again).
He keeps talking about his ex wife, how she regrets losing him, how she thinks he is a great dad, she's asked to spend Xmas day with him and kids etc. They are 5 years divorced.
When I'm at his house he says to do something then criticises me for it when I do it. For example he said help yourself to toast for breakfast, then after I got some he said 'oh youre helping yourself to toast are you?' or he said to leave some things at his place (eg toothbrush) then later said 'oh you just treat it like your home and leave your stuff in my cupboard' with a weird tone. When I say 'well you told me to' he says 'I'm joking' 
I'm wondering if his change in behaviour is insecurity? He didn't used to be like this at all.