Hi all,
I just thought I'd get everyone's perspective on this as it's quite possible that I might be too much of a perfectionist and that I might should expect less from people, so here goes:
Today in my chem lab (first semester of General Chemistry) we had an experiment that involved figuring out some unknowns. We were fairly pressed for time, as our experiment had gone awry earlier with another part of the lab, so we needed to figure things out fast. We had to develop a procedure based upon earlier data in order to figure out what the unknowns were depending on whether they formed precipitates, sort of a process of elimination type thing. Well, the two people I was working with said "Oh if we just add X solution, then that means it's Magnesium!" and I was like "No, actually, it could still be Barium because..." This went back and forth for like five minutes. Now, normally I'd wonder if maybe my logic was wrong, but I was pretty danged sure I was right.
Well, this girl just decided to move on and write down whatever she wanted without justification, leaving it upon ME to do everything if I wanted to get a good grade and wasn't satisfied with putting in a half-hearted effort. Shortly thereafter, the guy that was in our lab group raised his hand, turned in his lab, and said that he was ready for the lab quiz. We weren't done with the experiment. Nowhere near. And we hadn't cleaned up. And he had done next to nothing to help us with any of the other parts of the lab. So basically he was going to ditch us and leave... so when the professor came over to check him out and I noticed, I lifted up my head and said "Uh, there's no possible way that you're done!" Our professor agreed and so he left and told the guy to clean up. Then the guy turns to me and says "You just ain't got no people skills. You ain't gotta disrespect me like that. You don't know me so well as you think you do." Um? I don't care WHO YOU ARE, nor do I claim to know you, but, you're not going to wash your hands of your lab group and leave us to finish everything up just so that you can get your quiz done and leave early. That was my take on the situation at least. I didn't say that though, I simply said "Well, we haven't cleaned up. I don't know.." and he interrupted me and said "Nah, you ain't gotta say nuthin' else", effectively telling me to shut up.
Then he went over to the girl in the group who was cleaning up and muttered something and all I caught was "That girl be trippin'." "Psh, yeah I know!"
I got everything done, thankfully, and my grade will be a good reflection of my abilities, unless I screwed something up due to being so flustered. My question is what I should do in the future. Should I ask my professor if I can join another lab group in the class? I really hate to work with people who don't care nearly as much about their grades as I do, leaving me to do all of the work or correct their mistakes when they mix the wrong test tubes, etc. Am I wrong? Was I wrong to call that guy out for not really being done? It might sound like I care too much about my grades to some people, but I really am a perfectionist and with good reason. I want to go to medical school and chemistry is one of the required pre-requisites, so I better make a good grade. People look over at my grades in class and like today for example, I got last week's lab back and I made a 19.5/20 and she said "Haha, you just can't get that last half a point, can you?" I'm tired of feeling ostracized for doing well in school. >.<
By the way, many many thanks to anyone who actually reads this and/or takes time to respond to it. I know it's a fairly petty thing to be upset over, so again, I appreciate it.

I think it impressed him enough that I cared about my work, not to mention some of it bordered on sexual harassment and that's not cool, so he let me go at it on my own with his supervision. It is by far the hardest class I have ever taken and I walked away with a B (the most hard-earned B of my life!). 
, I think you should talk to the professor. He may or may not choose to reassign the groups, but he'll be aware of the situation. You can ask him to keep an eye on your lab partner's behavior. The partner is the one who's totally out of line. If you're developing a reputation for wanting to get the work right and get a good grade, he should be trying to benefit from that, not flout it.