Communist
Making Marx proud since... Never
I think you should be attached to a roleplay even before the partner comes. Generally, you should be attached to the experience it can bring you, rather than the people around. Cause if the people are not so good or some drop, guess what? You'll still love the world. You can branch off and make your own experiences. Heck. Start your own version of the RP with permission. That's a situation I found myself in a few months after joining. The upgraded RP created was 10 times more fun than the original. Mainly because it was now being done by people that had a real enthusiasm for the setting, instead of other less motivating reasons.
If you find yourself RPing more for partners, instead of actual love for the story, you will honestly not get far. Anywhere. You will always be unsatisfied.
For RPs, I like and use the idea of having a "Drop Period". Time at the beginning of a roleplay where you do the most BORING things imaginable. All the character development and scene-setting that no one cares about. It's a necessary thing but not the most fun. 100% of the time, those not really interested or the more timid players will drop out. This is what you want. Come the middle of the roleplay when things start to spice, up you've accomplished a few things. You've taken out the non-committed without destroying the story. You've filled your character development quota. Third, now you get to reward those who've stayed behind with your best work. <-- At this point, I personally don't accept/re-accept anyone else into the RP, but it's up to you.
At the end of the day, just write what you want to write because you want to write it. Others looking for the same thing as you will eventually hop in the more you do so.
Without a partner, the story can't really progress so that's invalid.