Advice? Please I need help

It will be long but if you have a while please help me,

So I have been in relationship with a guy for like three months now, and I really like him, I care about him, I don't know how he feels about me, I think he trusts me cause he told me personal things, and he cared about me. At beginning we used to meet two times a week and then it became one, now I have not seen him for 11 days, and I just had really stressful week and he said he is free Saturday(after his work he works till midnight )so I was happy but now he also had stressful week and he says he is too tired to meet and that tomorrow he has few things to do so probably we not gonna meet, and I just miss him so much, I don't want to tell him that I'm crying right now and that I miss him, I don't want to force myself on him. I just want to see him so much and I feel like shit, I don't know how am I gonna handle another week like this one at work(my manger has been supper annoying). I don't know if he cares about me or not I think sometimes he does but I just don't know,

I don't want to tell him how I feel cause what if it's too much trouble for him, I just don't want to emotionally blackmail him into meeting me, maybe I'm overreacting

Just to clarify im 19 and he is 23,