Not a relationship issue

I have had a best friend since school days. We are both 26 now. However, I have noticed a few things about her in the recent years which I was very oblivious of before.

1. Whenever she calls she only talk about her issues for hours on end and shows little or no interest in my life.

2. She gossips a lot.

3. She cheated on her bf. Secretly started meeting a friend’s bf.

4. I have introduced her to my bf in the past. But she has never introduced me to any of her bfs. In fact on two occasions her bf was around but she just somehow did not make me meet him. However, she has introduced him to other friends of hers.

5. She will always complain about the fact that we don’t have a lot of pictures together and then one day we met and took a lot of pictures. She still didn’t feel like uploading any pictures with me. However, she did update pictures the very next day with her other college friends.

6. When I was in college she was almost stalking my college’s Facebook group etc. To get more info. Added friends from my college in her account Idk why. Probably to enquire about me. And then insisted she is alone and bored and wants to visit my college. So I introduced her to my friends. However, when she joined mba college I told her the sane that I’d love to meet her friends. She never introduced me to anyone. But she did introduce her other friends to her new college friends.

7. She is generally never there for me when I need to speak to her on calls etc. But will be there when she needs help.

All this then she keeps singing to me that I am her best friend. What kind of a best friend is that? Will it be right if I totally cut her off? I feel very hurt and confused by her behaviour.

7.