<human>: Can you condense the text into three sentences or less?

Me and my best friend have been friends with benefits for two years now and just broke up. When it started we were all lovey dovey and couldn't get enough of eachother for a good few months, then I messed up and we fell out but quickly got back together again, we argue a lot but love eachother, as friends and more and these arguments are usually over her getting upset by silly things.

We've tried being together but we both change and decided that it would be better to stay as we were. Over the two years, she's went off with multiple people (we've stopped for the time) and then whenever something went wrong with those I was there for her and took her back. This year it started to go a bit downhill, I suppose we were both bored and needed something different and broke up not long after our 2 year anniversary while still staying as best friends.

A couple of weeks later she got a new boyfriend and started to spend all her time with him and I got upset and told her about how I felt, she got mad and we argued but then sorted it out. I must have seen her 3/4 times (including our anniversary) over a month or two (we used to see eachother almost everyday). With her encouragement I started talking to another girl to try and get over her (the other girl has a boyfriend already and I'm not interested in her in a romantic way).

The night I started speaking to her my friend seemed a bit off with me and I repeatedly asked what was wrong for her to tell me nothing, I knew there was but decided to leave it, I tried to speak to her but because of how she was being there wasn't much conversation. Later that night she asked if I was still talking to the new girl and I was so I told her, she then got mad and accused me of leaving her out and has been like this ever since and is just getting worse, she's even told me I can't talk to her if I'm still talking to the other girl. I still want a friendship with her while continuing to talk to the other girl. What can I do to get her to realise she's not being fair?
<bot>: Was FWB with a girl for two years, we broke up, she got a new boyfriend and I started talking with another girl, she didn't like this and started to get mad at me for leaving her out. What do?