Ah, brother. To keep that one HB, you need to have 2 or 3 other girls on the side so you can keep that one HB.
It's all about goals really. Some want to fuck 5,000 girls during their lifetime. However, if you have been fucking one or three different girls everyday for some 6 months or so, you'll realize that counting for the purpose of getting into the Guinness Book of World Records doesn't appeal to you anymore.
So you'll change your game goals to target the hotter and more good looking girls. After awhile, you get bored of that too so you'll target a different goal. Say, you want to fuck close 10 Catholic nuns. These nuns maybe HB5 or less at the very least but the level of difficulty can get your juices up.
Like in any game, you'll need to level up somehow and not remain in one place. But when you get tired and bored of it all, you'll settle for one girl. However, this won't last because you can never keep her if she is the only girl in your life. She needs the drama or emotional roller coaster ride. And so the cycle starts all over again.

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Approach. Open. Escalate. Isolate
Here are my two essential rules on texting that will save you tons of time and money:
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