I'm sorry, i know this is hard to hear but if he is no longer making time or staying in comms,
He has lost interest and is kinda a dead lead from this point on...
Even if you restore comms it wont be the same and youll always have questions in your mind, (am i not good enough? being the main one & i wonder if he has other girls)
being 27yrs young your still ok, im sorry to say this but you will have to start looking for someone else