gem0109
I feel having my current manager write a rec will show that I didn't switch employers, completely screw up, and now I'm desperately trying to get out and go to school
Without knowing more about your situation, I'd say this is a strong enough reason to go with your current employer. Plus, schools will want the most recent picture of your professional performance. One exception would be if you have two REALLY strong recommenders in your recent past, aka past 3-4 years.
gem0109
but I know after only working with me for 6 months, my current manager won't know a lot of detail about me.
I've only worked with my current boss since March (applying round 1, so about 5 months experience), and I'm using another recommender who I've worked with for 4 months for some of my schools. However, I'm very close with both of them, so I'm not concerned about the short lengths of time. Again, I don't know what your case is, but I'd reach out to your boss now and explain the b-school application and recommendation process thoroughly (like a 20-30 minute sitdown) that'll also go over your goals, what he/she thinks of your strengths, weaknesses, etc. If you periodically talk to them about this, they'll make mental notes for your recommendations in a few months. Don't kiss ass or try too hard, just make yourself visible and available.