I get it why Gwen missed Miles so much in ATSV cuz he made both her and Peter B want to get their lives back in order and recover but when Peter B went back home after ITSV he had MJ for that and soon Mayday but Gwen couldn't get her Peter back like Peter B could get his MJ back. Miles wasn't just someone who inspired her to move on, Miles was the person Gwen wanted to move on with but he wasn't there anymore and she wanted him back.