I suck at making friends

Hi, everyone. I I have never really had a friend. It is reall difficult for me to have a conversation or to feel interest in the other people. And I know that's wrong and that's the reason I don't have anyone but I don't know how to change that. 
Lately I have been having problems with my boyfriend because he knows a lot of girls and talks to all of them and he always tells me that he likes to hear different points of view about things, and having that people in his life and I agree, that's great, but it's very difficult for me to see that he's the only person I have contact with, I want to change that snd I don't know how. 
Any advice? 

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