Time to let go ??

My boyfriends mother is BEYOND deisrespectful to me and I've never once disrespected her. We've been together for almost 3 years and I've always but my tongue. Last night I went on a rant on my Facebook not meaning to post just to vent. I was saying she's miserable , rude , etc I accidentally posted it was up for all of 30 seconds and my boyfriend called me and broke up with me saying I disrespected his family so I said what about how she disrespects me ! He said nothing , he said he's never calling me again and he doesn't love me anymore an maybe I should find someone who can deal with my "ratchetness". So I said fine ! I felt bad for going about the situation how I did so I apologized to her about that not about how I feel ! She ignored it and he hasn't called or texted me all day. What should I do ? I'm not gonna kiss ass because I was in my feelings ! Almost 3 years, it was bound to come out one day !