Break ups and moving on too fast?

Jessy

So I have a best friend and me and him confided in each other about 2-3 weeks ago that we were attracted but made very clear boundaries bc I was still in a relationship with my now ex boyfriend. (My ex lacks so much empathy and really just didn’t know how to treat woman with respect and honesty). Well me and my best friend are unofficially dating as you could say. I wanted to wait a month but me and him just couldn’t resist it anymore. My ex and I were together for almost 8 months and this is the first time in the last 3 I’ve actually felt loved and happy since. My ex called me the day after I broke up with him and accused me of being a man hopper and using him just to get to my bestfriend and stuff and so I blocked him and all his friends on everything bc I didn’t want to be harassed by anyone about it anymore.

I still feel really bad about moving on really fast but I’ve had my mind made up subconsciously for about a month now and it finally just all lined up. I just wanna know what everyone else’s opinion is and if any of y’all have experienced something similar.