I'M FRUSTRATED 😤

I'm really trying not to make this a big deal but it's becoming a big deal. I know he works, he works hard but he always used to make time to see me and put in effort to talk. We haven't seen each other for a month, and now our communication levels have gone down the drain. He no longer talks to me during lunch, or the morning, and now the night is fucking sparse. I'll send him messages through the day and he'll read them but won't respond. When he gets off of work it's the same scenario. He'll respond once or twice but that's it. I've told him how I've felt but ended up being guilty because he says he's "busting his ass working" and then coming home to more work and working on the house? But I don't get it.. I work, I go to school full time and still make time for him but he doesn't even attempt to make time for me. We were supposed to see each other this weekend and he canceled the plans. He says he's trying but I can't tell.

Maybe I'm overreacting but I'm going crazy and trying not to jump to conclusions. It's been weeks of this, I just want things to go back to normal. What do I do? Give him space?