Relationship help

Madi

I need to know what to do. My boyfriend and I have been super close and happy with each other since the first day we met. We've gone through some ups and downs but we normally make it through them even stronger. We recently got into some sad stuff that was really hard for us and he was even thinking about just breaking up with me because he was so sad and mad at himself. We got through it and then today he all of the sudden started ignoring all of my texts and phone calls. He said that I'm the love of his life and he would never leave me because I make him the happiest he's ever been, but I'm really sad and stressing rn because he isn't answering me at all and leaving me on read. Idk what to do.