I would say watch what he does, not what he says. Anyone can talk the talk when they are trying to impress you, tell you how gallant and caring they are. But when the chips are down, how does he treat you? Does he listen, take on board what you say, show you that he is interested in what you think/feel?
I have just finished a 5 year relationship because of the way he speaks to me when we argue. When things are going well he is sweetness and light, but the minute I ask anything of him, or challenge him in any way he becomes nasty, spiteful and aggressive.
I could have seen this within the first month I knew him, in fact he told me on our first date that he was arrogant, lazy etc and I laughed along with it. He showed me during the first few weeks that he wouldn't put himself out for me, while I was delivering home made soup and TLC to him, I asked if he would take care of me if I caught his illness. He replied, "well only if its not on the days I have my kids."
Bearing in mind he works 5 minutes from my house and was able to pop round for 'lunch' at mine whenever it suited him, he could easily have just said yes, but his instinct was to reject my plea for equal attention. It said everything I needed to know, but I didn't listen.
There is a MN saying "when a man tells you who he is, believe him". I should have listened and stopped myself getting so tangled up in his life, as its so much harder to let it go after 5 years. 