My girl best friend of 8 years cut me out of her life because her boyfriend doesn't like me
It is hard to let go of a friendship when we don't fully understand the circumstances, we don't like loosing contact with people we care for. It must be hard to see this relationship happening with your friend, especially so as it sounds like she is being abused by this guy.
I'm not sure there is anything you can do to change the situation. The other guy obviously does not want you to be a part of the girl's friendship group anymore.
Trying to push your way back into the girl's life may make the situation even worse for her. I guess if you really care for her, you can be open to receiving a call from her if she happens to make contact with you.
It can be hard to say goodbye and let someone go.
My other concern is for her safety and well being!Cheers from Dools
First let me say outright that the presence of bruises on her arm and the fact that you have seen them raises questions. You must report that to the police. If you believe her welfare and safety are under question then you have a good reason to report it.
Then if need be, don't contact either of them
You want your friend to be safe. She may not like the fact that you've reported it to the police, but you must. Especially if she's showed you.
The fact she blocked you on social media does suck. It makes you feel bad. But you're not a bad person here.
Just ensure you do the right thing please.