Why does it seem like he is ignoring me? :(?

Okay my boyfriend who has been away at college came home late Monday night,his real mom brought him back.I haven't talked to him since Sunday night,we were talking about how excited we were to get to see each other and how much we miss each other.We haven't seen each other since Thanksgiving.He hasn't been on facebook since Monday,he was telling all of his college friends farewell cause he won't be back next semester due to financial issues.Now tomorrow is our 4-month anniversary and I feel like he is ignoring me in a way and it kinda hurts me that he hasn't called me or left me a message on Facebook letting me know he made it home,I had to talk to his little brother Tuesday night on FB just to make sure he made it home alright.The only two that have been on Facebook since he got home was his dad and brother.His dad said on his FB that he had to get a pport for the bahamas that he is leaving for a week,and that it was for work and no play,he is a mechanic..My mom says that's BS and I don't know why he would say that on his facebook,even his sister was like "What are you talking about?"I called Tuesday evening at about 6 nobody answered,I called again at 8:30 and it went "Beep.Beep.Beep." like the phone was disconnected.I called again this morning and it rang but nobody answered.His dad works from i think 8 or 9 till 6 or 7 pm and I don't know if maybe my boyfriend goes with him to work.My mom thinks maybe so they can afford to keep their house,maybe his dad has been putting him to work at the mechanics shop.I guess the only reason I am so upset is because he hasn't contacted me since Sunday,which was on Facebook.He has no cell phone anymore,he couldn't afford to keep it on.He has my house number but he hasn't called yet.I always end up calling him first.I haven't ever told him that it would be nice for him to call me,I just expect that he would call me.I will not be calling him anymore,he has to call me or talk to me on Fb.I guess I set my expectations too high.Why hasn't he contacted me yet? Is he just THAT busy?