Whoa ... you should never put yourself down to a guy. If he thinks that YOU think you are 'nothing'... well, pretty soon he will also think you are nothing ... and go off to find a girl that is SOMETHING.
Never, never put yourself down to anyone .. not just a man. You are just gonna internalize that stuff which will lead to a not so good .. end.
btw - you should count yourself lucky that this guy was not a rat and the type that would take advantege of you.
You know ... this exactly how women end up in abusive relationships. They are lonely, feel bad about themselves are alienated from friends and family etc and BAM one day this 'charmer' comes along and tells you exactly what you want to hear. Then everything moves FAST because he is so crazy about you and before you know it you get tied to him in some way and THAT's when he started belittleing you, putting you down etc and if you stick around - here comes the CONTROL and well.. you can guess how that situation turns out. Not so good. Men like this can spot a 'target' like this ... a mile away.
You need to build some self esteem or you are CERTAIN to attract one of these kinds of men in your life eventually.