I feel bad...

My baby’s father and I are not in good terms right now.. about 3 weeks ago I went thru his phone for the FIRST time in the 3 years we’ve been together I was never the type to go thru someone’s phone. I found messages with this girl we argued constantly about, and yeah I left but I guess she cut ties with him so now him and I are still seeing each other when I go over he always hides his phone, he always takes it with him when he goes to the restroom or when he’s sleeping he always has it in his pocket. I feel bad I feel bad because I went thru his phone and now he hides it from me..: