Are you really sure his calls are check ups over you? what if its the only time he gets free and tries to speak with you.
Of course you know him better and there must have been things that you haven’t mentioned but Marriage/ Divorce are really important and sensitive issues. I would just suggest you to make sure he is really “that kind of” guy and not really the one you wanted.
On the other hand, if you really think that he is not what your partner should like, then its better to have a break up now than later when you two have not developed any emotional and physical relations. Its really hard to leave someone you live with. Turning 30 doesn’t stop you to think for yourself neither do your relatives who can just haw haye but won’t come to you when you really need them. Stop caring about others. Live your life happily! You have every right!