<human>: So basically, My girlfriend and I have been dating for about 5 months now and we are currently in a semi-long distance relationship (hour and half drive). We started out amazingly, and everything up until the past month seemed too good to be true. But recently, I've become unnaturally moody about us. Sometimes I feel as if I couldn't be happier and I feel so good about us, but then randomly something small and dumb will make me upset or insecure about us, which in turn makes me act really cold towards her. She then gets really sad and starts crying, which makes me realize that I'm hurting the love of my life and snaps me back to reality. I then apologize and promise her that it wont happen again but its become a cycle. 

I know what i'm doing is wrong and I try so hard to fix it but something always has to get to me and make me be mean to her. It has gotten to the point where I don't even feel like I can apologize and tell her that It will be better because I've messed up so many times. I suggested a break but that is the last thing either of us wants right now. I'm just not sure why i'm feeling like this out of nowhere. I know i'm young but she's honestly perfect and I know this is the girl of my dreams and I want to live the rest of my life with her. I'm just really lost and am looking for advice on how to approach this problem.

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<bot>: recently, i've become extremely moody and insecure about my relationship with a girl that I want to live the rest of my life with which causes me to be mean to her and hurt her.