Need advice please take a look

My boyfriend went Mia from me and so we haven't been communicating since Sunday night. We met on Saturday and went to the mall to shop for my mom's birthday present. I couldn't pay a lot of attention to him. I was exhausted that day from early pt, and my mind was on the present that I planned to buy for my mom. After a while, I constantly told my boyfriend that I was sorry to not pay a lot of attention to him, especially when we got to meet Escher after a month. He said it was fine and that he enjoys spending time with me and I make him happy. But it still doesn't feel right. He was very tense that day, about things hAppening at his work, his phone broken because of field and won't charge at all, bad thing happened to his friends, nervous about meeting his family in two years, his dad never calls, but he got calls and multiple texts that day. 

When we were on our way out of the mall, he told me that he was depressed and so I listened to what he was saying. And then we went to go eat, and it was good(: but he didn't eat much. In fact, he barely ate.. I was so worried and when he dropped me home, he wanted to go stargazing but I declined and told him that I was really exhausted and tired and that he should go home too. Was I being selfish? Thinking about it now, I should have had him sleep over at my place. I'm worried. I've sent couple of messages but I haven't gotten any reply back.. What should I do? Please give me advice please. I need as much I can get. I'm trying to give him space but I'm not sure if I'm doing them correctly or not, whether he still wants to be in a relationship or just end things with me. I really love him, trust him, and I believe he's different than the other guys I've been with and I want to spend my future with him too. I don't want to lose him. Any advice I should keep in mind?