Expanding on what Immortal said because it's really important, don't talk about your problems to her. When telling her your stories about hanging with other women, you don't have to necessarily go into the specifics as if you're trying to get her jealous. All you want to do is subtly let her know from time to time that you hang around women.
Example: I was at a bar the other night with one of my good girlfriends, and the craziest thing happened. Then you just proceed to tell the story. It tells her that you're social, and that you hang out with other women. It's as simple as that
You do want to reward good behavior and punish bad behavior, but that's different than being "aloof" and "indifferent." Let's say she texts you first, you reward her good behavior by having an entertaining conversation and ending it on a high note. This will make her want to text you more often, and you yourself at the same time remain "indifferent" because you're not acting overly excited that she texted you first. This communicates non-neediness and will only benefit you.