When it comes to going exclusive or semi-exclusive (MLTR), NEVER SETTLE. You know exactly the kind of girl you want to make you happy, so don't settle or compromise just to say you have a "girlfriend." That just leads to unhappiness and resentment in the long-term.
And that's why a lot of guys get their heart broken: they settle for the first girl who gives them the time of day, realise after a few months/years that they don't fully satisfy each other, then either party cheats, and we're back to square one. The lucky ones find their way to Game, and the really smart ones find their way here to the Bravohood
That's not to say that you should sleep with girls who don't completely fulfill you: keep those around as fuckbuddies or "second tier" girls. But for your primary girlfriend, she should be exactly what you want.
If you haven't written out a list of what you want in an ideal girl, do it. And as you date more girls, you'll start refining this list so you'll know ultimately the girl who you'll be happy with.
The point is: NEVER SETTLE.
But you already knew that