Coming right out and telling him everything about it may be a bit 'too much, too soon'. A better approach is to slowly build up to this by telling him about the things you enjoy doing for him, that just happen to be submissive, while also letting him know that you enjoy him being dominant.
Starting with simple things is best, before graduating to telling him about the more extreme submissive tendencies you may have.
Being Submissive Does Not Mean Being Weak
Just because you want to learn how to become more submissive for your partner does not mean that you need to become week or feeble when you are around him. In fact he will probably respect you less if you do start acting weak and feeble around him.
To make sure that your partner still totally respects you while you submit to him, it's important that you both establish some ground rules so that it never gets to a point where you no longer have control in your life and he has total control.
A major component of establishing some ground rules with your partner when you are being submissive is what's called a 'safe word'. This is a word that you wouldn't ordinarily use to let your partner know that you are no longer comfortable with being submissive and want him to stop. Making sure that you both know the safe word and when to use it is crucial.
These are just a few tips on how to be more submissive, but there are other ways too... If you want to learn how to talk dirty to your man in a way that's submissive and turns him on, then you may want to take a look at this dirty talking video. If you'd like to learn how to give him a submissive, sexy blow job, then you will get a lot out of this video.