Why don't you talk to your once "best friend" anymore?

This will get buried but whatever. This hits home because I am currently going through the slow-fade out process of a friendship. I realized she is very controlling, self centered and ignorant. I've done absolutely everything for her (even stayed up all night on multiple occasions writing papers for her for her masters) and I realized unless it's convenient for her, or benefits her in some way she wouldn't lift a finger for me. Recently she came into my office which is in the city (she doesn't come into the city much) and my coworkers and I brought her out to our favorite bar, I knew she was broke so I even paid for the whole $150 bar tab she almost single handledly racked up but she decided she didn't like it and threw a tantrum about wanting to go home, saying she didn't feel good. She made me look like an asshole in front of my co-workers. It was so bad that the bartender texted me the next morning to see if I was okay because she was so horrible to me. However, I digress, the minute we got back to the area she lives, she wanted to go out to a bar there. The other issue is she is not intelligent, that in and of itself doesn't bother me but what does is that she doesn't even care. (She didn't know who Kim Jung Un was or that North Korea was a problem). She has wild unsafe sex, like she will go out meet someone fuck them without condoms, refuses to be on birth control or take plan b.. but will ask me if i can take her for an abortion if she was knocked up... and voted for trump saying she didn't believe me that he wants to make abortions illegal. Completely don't care who you voted for but jesus, just know what your candidate stands for. She also has a controlling aspect. Whenever I want to invite my other friends to hang out with us she will make up a reason that she doesn't want them to come so we hang out with her other friends. We have known each other for 8 years and been close friends, so overtime 'her' friends have become my friends too. However, there have been occasions where she can't hang out so me and the other friends try to hang out and she FLIPS out saying that she feels really uncomfortable that we would hang out without her. Just the other day I texted her friend to ask a question, and I guess she was with him, and I got a text from her telling me not to do that. I am just done.

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