I will probably raise more questions for you then answers. I married a "Catholic" man, however, he never went to church with me or the children except for funerals, weddings, etc. I ended up drifting away from my faith for a number of reasons, it certainly did not help that I had no spiritual head in my family except a non-practicing Catholic that was abusive.
Just because somebody claims to be Catholic does not mean they are. I have seen "unbelievers" that are more honest and upright in their dealing with people then some of the so called faithful. I have also seen people who are "outside" the church that are more "inside" it then they realize. It is a heart thing. Can you tell that he has a good and sincere heart.
That being said my advice would be to look more at his actions, history, what your family and friends think of him. Do not just go on words - they are worthless. For so many people, words are like pennies when they should be like diamonds. Does what he says match (at least fairly closely) how he acts.
It is not easy to go to church every week with children alone (whether you are single or married). It is not easy when you don't share that, if it is of real importance to you. Marriage is hard work, we start out in love and as life goes on we have to keep recommitting to the relationship.