Don't tell anyone, but I broke a promise I made to my boyfriend and he doesn't know
Tell me more.
I want to show him that I'm superior than him
You shouldn't keep things from your partner and turn your relationship into a competition. If you want to feel superior to your partner, maybe you shouldn't be in a relationship based on competition.
I don't need your stupid advice. I'll do it my way.
Extreme competitiveness can destroy a relationship. Try toning it down a notch. Think: playful competitiveness.