She wants out.
She doesn't have the guts to break it off clean, so she's going to starve you of your needs until you initiate it. It's a pretty common tactic.
Break up with her while you still have some dignity, and put the next girl in her place when she acts up. Women secretly appreciate it. You see what happens when you don't...
In the future: Know your value in this world. If you aren't getting what you're worth, replace the c*nt.