Don't know what to do

My boyfriend hasn't been showing me affection these pass 2 days... This morning around 5:30 AM hawaii time I tried to check his phone & it says enter pin! He hasn't had a pin on his phone since Day 1 & now he does.. I'm gonna question him after work. Am I doing something wrong? Like his exes treated him like shit. I'm da 1st girl to show him what true love is.. I cook for him, I clean, I help pay for shit, I spoil him basically I do everything n anything to keep him happy.. ughhh!