Girls: if you break up with a guy for not understanding your needs, might you take him back?

First off she's a very good woman for putting her needs first. This shows that knows to take care of herself first before she can take care of anyone else, this includes being in a relationship. Yes it's possible to still love someone but break up with them because they're not giving you what you need, it takes more than love to keep a relationship lasting. It is really hard for a person to change who they are or how they act, so she definately has her guard up and is cautious at giving you a second chance. The unfortunate thing is there's no way of telling whether she will give you another chance or not. You can always say you'll do things differently but until you actually show her she won't believe it. Good luck.