My boyfriend vs my best friend

My best friend thinks that I can't take care of myself and is worried about me and my new boyfriend. My boyfriend is a great friend of hers, but she thinks that I'm making a mistake. She also stated that I'm making up for my ex, but she doesn't get that...

I move on quickly. I can handle myself.

I promised her that if anything starts to go wrong, I'll either fix it or end it. I won't let it linger because I don't want to hurt myself, because it hurts her at least ten times more.

I love my best friend to death. She means more than the world to me. She is the best thing that has ever happened to me. But I love my boyfriend. I really do. She doesn't understand.

What can I do to make her understand and worry less?

Cay-J

its your relationship, you have the right to controll it yourself

ok you need to think on your own dont let your best friend tell you what you need to do just sit down and think about what makes you happy and if your new boyfriend makes you happy
then thats all that matters but if you still in love with your ex then you need to let your new boyfriend no right away be for it gets to deep in love nieya