Don't get pregnant because you (alone of the two of you) think it is a good idea, get pregnant when the two of you have such a rock-solid long-term relationship that *he* is talking about how great it would be to have a child. Sorry, but you really can't wish this on a guy. What he is thinking, if you really want to know, is "She took a pregnancy test? OH NO!!!!!" but he is too polite to say so.
Whether it's positive or negative he should be there for you. My bio father left my mom when I was little and I am in my twenties and still haven't heard from him. Maybe the negative test was a good thing if you feel wronged by him?
Just make sure next time be careful, because some man they don't care. Huh...