Everything's unraveling

I'm a 17 year old kid, a senior in high school, and one of the most stereotypical ENTPs I know of. TL;DR: I'm currently in my first relationship and I'm realized everything I've done my entire life is unhealthy. I perpetually keep telling my girlfriend she deserves better and it's gonna make her leave.My entire life I've built up this concept of sheer arrogance and cockiness as a defense mechanism because bellow that, I'm one of the most insecure people. I feel utterly worthless and now that I'm in a serious relationship, I feel like everything is falling apart in me and almost every other week I break down and tell her repeatedly that she deserves someone who isn't a piece of shit. I've had several breakdowns because of me having to challenge myself on who I am now and its really freaking me out. I don't know if I'm not supposed to be in an actual relationship, or if I've screwed myself digging myself this deep in my arrogance but its scaring me.This all came to a head where I had a really bad breakdown last night for close to no reason, and I went from a high of extreme arrogance to a low of extreme feelings of sheer worthlessness, I apologized and things seemed to be ok until now I guess her friend is telling her to leave me because I'm emotionally unstable. According to them I'm the best relationship she's had but now I'm questioning that myself and everything's really difficultHer parents, and family, brother and everyone loves me and so this is all extremely difficult for me to swallow in general, and I love her more than anything and I'm really lost right now​All may be cringe but fuck it I need to know this is something else someone else has struggled with because I'm really lost. via /r/entp https://ift.tt/3nYAsU5