<human>: Give me the gist of the text in a nutshell

My bf (23) and I (23) have been together for 2 years. He has always been pretty insecure and I know for sure that he feels like he doesn't deserve me eventhough I always tell him I love him, how perfect he is for me, and that I want him by my side for the rest of my life. He got issues, like everybody, but he only focuses on his dark side. He doesn't love himself.
A few days ago we had a fight (his insecurity was the reason) and I told him I need some space and time to think. And that I think he could take this time for his own good, working on his insecurities and that he maybe needs professional help. He doesn't understand this. He's telling me I don't love him beacuse I'm leaving him on his own, that I'm only thinking about myself. He won't respect me and now I feel I don't want to be with him because he isn't letting me breathe. I need air. This is not the first time we fight for something like this. At the begginning, I tried to help him. But now i've realized he is the only one that can help him.
Please, how do I make him understand I need time and space? I asked for three weeks.

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<bot>: I need time away from my bf and his insecurities. He doesn't understand. What should I do?