Boyfriend Issues

Alexis • Hey!
I don't like to complain but I would really love some advice. 
My boyfriend And I haven't been getting along. We are LD (Long Distance) and it's really hard. He hasn't been paying good attention to me at all. I was really Worried about him like four days ago because he didn't reply to me for a whole day. So I was calling and texting. He gets back to me the next day apologizing and telling me he was sorry. I said it was fine and that I'm just glad he's okay. After that we had a call or two but he seemed upset about something so I tried to talk to him about it. But after he hung out with his friends and didn't talk to me much. We almost ended it yesterday because he said he wasn't giving me enough and he wanted the best for me. I told him change things and we will be okay. And now tonight I get no replies and I get left on read. I don't know what I should do. I love him more then anything and I don't want to leave him. Please any advice on what I should do?