Insecurities - I really need help ladies

Okay guys so we all have our insecurities and that's cool but the issue I am having is with my boyfriends insecurities. He freaks out that he's not good enough for me and when he drinks he often tells me I should find some one better.

He is struggling to find a job, and we've both finished school and he doesn't really have a plan for his life.

I keep telling him he has time and it's going to be okay and that these things dont bother me as long as he is happy. But he truly believes that he is not good enough for me because he doesn't have a job and cant provide for me.

I don't need him to provide for me I just want to be with him but he doesnt feel like thats enough for me.

He is dead set on believing I am going to either leave or cheat on him even when ive given him no reason to think that. And he often says that he wouldnt fight for me because he knows I deserve better.

anyways I really need help, because it is becoming a serious issue

How do I convince him that I am not going to leave him and that I love him no matter what?

How do I convince him it is going to be okay? He's only 19 and he has so many options.

What's your opinions on my situation ladies? What would you do in my situation cause im fkn lost