I need advice what to do..

Hello! I heard i could vent on here.. anyways i need an advice what to do in my relationship. Im worried that my partner is losing interest in me.
We been together for almost 5 months now [we are basically living with each other ] recently hes always on his phone smiling but whenever i go towards him. He hides his phone right away.. he made me delete all my male friends during the beginning of our relationship but today he apologized to me about it saying i could contact them again..
Hes still friends wit his exs..
Im just worried he might be losing interest in me
He sent a girl an friend's request 2 days ago
After that he's always on his phone