Driving my boyfriend nuts with insecurity

Rejection sensitivity has been driving my relationship apart we have been long distance for 7months known each other for a year. God I really care about this person so much and I am driving him nuts at the moment to the point of him being really pissed at me.

I really wish my brain wasn't like this. I have just finished a really hard degree (Mechanical engineering with honors) plus started a full time graduate position, but I cant seem to be a calm collective girlfriend I used to be. I will reject myself and last night was the first time he called me out on my insecurities which they are to a T it must get soo annoying. Saying things like "I'm sorry I'm boring", "are you still attracted to me"... it would get tiring after a time but my brain just keeps on doing it. Putting pressure on him. He is calling me out from a place of care which I appreciate.

My goal is to work on my career and eventually move to Aus I really like it over there too. I don't like it where I live which probably doesn't help.

He has been the most calm caring man to ever step into my life and treat me amazing makes me feel amazing. We had a talk last night and he said I think you need to date someone closer, I have tried that. My town is no good for dating. I live in NZ he lives in AUS a 3 hours flight. He has came and stayed with me multiple times and they were so nice he is so nice.

In our forced conversation I mentioned can we work through this he agreed. I really want to work through this then my mind goes is it ruined, any advice from someone who has gone through similar or has been on the receiving end would be greatly appreciated.