<human>: Can you succinctly summarize the text in 1-3 sentences?

I love my best friend, and we've gotten close enough that we have tried being together, twice. When were just friends, were great. We laugh, we hangout, it's fantastic.

Although, when we decide to get together, it's like the complete opposite. All we do is fight. Sometimes about the most ridiculous things. We get jealous, we hurt each other emotionally, and it's really unhealthy. When were together, she talks about other guys, doesn't make time for me, she's very unaffectionate and likes to put me down. Don't get me wrong, she's a really nice girl, beautiful too but when were together, it's like she doesn't know how to act.

She's had other boyfriends before me so she's experienced with relationships. But it just doesn't work, and we agree that we don't work so we try to move on, but when we try to move on or see other people, the other becomes very upset.

Now I met this other girl, she totally great, she's beautiful and she treats me awesome and I feel like she actually cares about me. I'm crazy about her. But my best friend just told me that she wants to try again, despite everything that has happened.

I'm stuck in the middle. I don't know what to do. She thinks we could work out great but why would I make the same mistake three times. I don't know though, it could be great. I think we should move on, but she doesn't want that. I don't know what to do.
<bot>: Me and my best friend aren't happy when were together, but we get jealous when the other is with anyone else.