Maybe "something doesn't belong to you just because you want it" would be putting it better?
You don't understand sir,
I want it more."
But yeah, "you aren't entitled to contact info solely because you want it" is definitely better.[DOUBLEPOST=1496186409,1496186101][/DOUBLEPOST]
You're mistaking the term "something to offer" as a material good. The speaker is saying that you should have some good personality traits to offer her. You should be kind, or funny, or romantic, or... anything other than desperate.
Thing is, everybody thinks they're kind, romantic and funny. Or at least they believe they "can be if they need to." Anybody looking to woo someone is gonna be kind, romantic, and funny (unless they're negging). That's the whole thing about intangible/personality based "things to bring." It's kind of like how everybody believes themselves to be an "above average driver." (With apologies to Dave Barry)
I just imagine a situation where someone asks "what is it, exactly, that you bring to this relationship?" and their look of mild disgust when the response is "I'm kind, romantic, and funny?"