I really need opinion/advice on what has happened to me.?

Yesterday, I went online and (of course ) my bf leaves his gmail account signed on. Which is fine, he’s done this many times before but I simply have closed it in the past… I got the sudden curiousity ( of course ) to type my name under the search engine in his email, which allows you to type a keyword and it brings up all emails or chats that have that word or name in the context. I am deeply hurt by what I saw. We’ve been together for three years. We live together. As far as I could tell we loved each other dearly, mutually. We’ve had our problems in the past, but have worked them out, and for the past year I’ve never felt closer to him. We laugh a lot, have a great sex life, I thought we were like best friends. We were supposed to drive up to meet his Mom and Dad next week for the first time. So anyway, the results come up.. and I see my name here and there mention in emails and chats to his family. Out of curiousity, i open them.. low and behold.. my dear, beloved boyriend is trash talking me. I didn’t see one thing positive ( emails/chats dating back to one year). I was described as unstable, crazy, nagger, winer, moody, jealous
(ps. im not perfect, but if anything this dude has all these issues. I’m a damn good girlfriend.. he tells me all the time.. which is why this is fucking weird.) he even took jabs at my sister and said she was over weight and a gold digger and other family members saying that I had bad genes, and that we are basically trashy..which the brother of course responded by saying " oh no, thats an indicator that shes her families messed up man, when are you gonna meet a girl you can bring home to mom and be proud of?" . Hmmm… nothing positive. My name was tossed around in a negative context. His brother even made a mockery of me and said a few slightly racist things that I didnt appreciate. Another thing he reveals many very personal things that Ive told him in confidence.. like in casual conversation. I don’t feel like I know him anymore. I dont believe that he even likes me. I can’t confide in him anymore. I’m sad and I’m very dissapointed. I asked him when he came home.. and he had the nerve to manipulate the truth..and basically turn the tables and said, "How dare I, intrude in personal conversations with his family.. and then he said, I dont feel sorry because I didnt do anything wrong. He said his culture (danish) is different then mine (hispanic) and that they "do not judge".. that he is very open with his family and that when he called me "annoying, rude, crazy". I was offended by this response. My intelligence was insulted and I also don’t buy it for a second. Talking shit about your gf is universally wrong. Now, I understand that none of you know his side of the "story".. but It really is this simple, I would appreciate some advice. I’m heart broken and am considering leaving him. I dont want to make this drastic decision, without some feedback. HELP!!
he mentioned that when he said i was "annoying, crazy, rude.. " that he meant them in an endearing fashion…??.. i hate it when my intelligence is insulted.

You need to leave him. If you dont have trust then you dont really have a relationship at all. If hes saying those things about you behind your back and when you confront him he says those things then he obviously doesnt care about you.