Torn and confused...?

I broke up with my Bf of 5 months because things started to feel different. He told me ..I was the one..like after a few months. We continued to talk about our future up untill around christmas time..He seemed to be seperating himself more and more..then drove up to L.A. ..didn't invite me but later found out he took one of his buddies up there with him..so here he's hiding things...not talking AS much about future stuff..maybe reconsidering it all..i don't know but when I ask him what's up..oh, nothings changed..he still loves me the same..so i guess i just got tired of going back and forth..wondering what the heck is on his mind. I guess it's just wierd to go from so serious..to almost casual..it doesn't feel right. now he's calling me saying he doesn't understand what's going on..why won't you call me...like it never happened. Is he trying to stay with me..or trying to not be broken up with..? I don't know what to do. I care about him so much but I can't continue to be mixed up