I'm a big fan of the prenuptual if one party has children or other serious financial considerations independent of the other party. Some argue that it's not "romantic"....but I say having similar perspectives on this type of thing and the ability to talk about difficult issues before there are problems is a good sign...given his past behavior, I really think that what you've asked of him is both smart and reasonable.

It's up to you as to whether you give him a chance, but you sound like you're going places...a bright future with a career...love does sometimes come with baggage but I'm not sure that he's shown what he'd be willing to do to keep you safe and secure in any decision to be with him.