For all I've not actually met her, it does seem like you're getting played around a fair bit pal.
I was in a relationship that was the same once. She put no effort in, she never bothered to come to mine, she always cancelled plans at the last minute, was always more interested in her friends than me, but I stuck with her cos I thought I'd seem a c*nt leaving her over it, and that it wasn't that much of an issue or whatever.
Few weeks later she left me! She left me! I felt like a right bell end after that
Can you remember what I drunkenly told you down in Sheffield about all this? I vaguely can haha