Being aggressive won't always help you get what you desire, the world doesn't work like that. When you're aggressive you sound like a bitter, know-it-all person. Most people can't deal with that, and instead of getting your way you could get someone to be aggressive to you and teach you a lesson. So why be a bitter aggressive person rather than turning it down a notch. Chill enjoy life, it's too short.
look, if he doesnt cares about you now what will he do in the future and if he talks u seriously how will he make u smilr in future. if he has a flirty personality after relation or marrying with you he will talk to other gs. The rest is up to you;)