Boyfriend going on trips

Emily • God bless this hot mess 🤘🏻
Whenever my boyfriend is away, he kind of treats me different. He is not a cheater he never will be I in no way think it is that, but he never calls, he doesn't accept my calls, he says the excuse that there's no service even in places that have service (we have the same provider), he ignores me, but then when he comes home, he's the sweetest guy on the planet and I don't understand what could be wrong.