I Miss My Boyfriend And It's Driving Me Crazy?

I've been through one sh!tty relationship after another but the one I have with my boyfriend of 6 months is one that I never want to lose. He's someone I can really see myself spending the rest of my life with. Everything used to be perfect and I enjoyed every moment we spent together, I lost my virginity to him, and just knowing I'm with him, I could get through anything. But now we've been going through a lot of ups and downs, for like the past month. I got used to the fact that we can't always spend ever moment together nor talk on the phone all the time, nor text all day. We normally text for an hour or 2 in the morning, and an hour at night, talk on the phone like once every two weeks (which I'm not happy about). But now we haven't talked in 3 days, he doesn't see me in the mornings, nor does he walk me to my bus or anything. Yesterday I texted him and asked him what his problem was and he told me he really just can't text/call/hangout/ because he has to get school together so he graduates next week (he's in no danger of failing). So I said well that's fine and to talk to me when he can. But I feel like he could at least say good night, good morning, and maybe talk to me just a little bit instead of going on like this without saying anything. I've been really depressed and crying and stuff these past few days because it's hard to deal with... I'm hoping things get better after graduation but I just feel like he's not interested in me anymore and/or cheating or something... I don't know what to do but I'm tired of feeling like this. I just got a job which I was happy about until the next day when he started ignoring me. I'm getting a motorcycle in 2 weeks which I was really happy about, and than I think about him and I feel sad again... I don't know what to do ):