I don’t know what to do anymore

I was just in a relationship for 6 months I’ve never fell so hard for a guy in my life . He didn’t grow up with a mom so his best friends mom was like a mom to him. She started telling me things about her sons girlfriend and I opened my mouth and told her... my boyfriend then broke up with he because “ I disrespected her by saying what was said and he lost all trust” I honestly didn’t think this would happen or it would cause drama but he thinks I knew what I was doing and that it was on purpose . He says what I did made him loose all feelings and I’m completely heart broken because of the fact he could give up on me that easily . We now barley text /he’s dry and is rude to me when I try to explain how I feel about things. I’ve been upset I wanted to feel confident about myself so I posted something on Instagram that I guess would come off as me looking like a hoe the bsf decided to call me a whore and it got back to me so I decided to tell him it upset me and just how that made me feel the bestfriend then told my ex which texted me and went off talking about how I need to learn how to bite my tongue how everything I think doesn’t always need to come out my mouth but I have no one to talk to and I get to these breaking points where I just can’t hold things in anymore and I’m just so heartbroken and then on top of that hurt about what was said I just don’t know what to do anymore