<human>: I need some advice because I've been stressing out about what to do since I found out this morning.

Backstory:
Boyfriend and I were together for almost a year when we started to have trouble and I broke things off. We've since been on and off twice (this current run is the 3rd time we've gotten back together. Yes I know this is not exactly the best foundation for a relationship but we're trying to make things work). Our latest break up had us apart for about 2 1/2 weeks so I understand that he reinstalled OKCupid back onto his phone in that time, heck I even did the same. We've been back together again for 2 months now and I've since deleted my app but I noticed by a chance glance at his phone screen one day that he hasn't done the same for his. Well curiosity finally won out this morning when I read an r/relationship post about a girlfriend still updating her dating profile so I logged back in to check things out. And there it is, his last login was on February 25th...

I'm waiting for him to get off work tonight so I can ask him about it and why he still has it on his phone. I also want to tell him that I want to look at his account. I don't want to believe that he would still be actively looking and chatting with other girls, but I also have this crushing fear that it might still be a possibility in which case I don't want to give him a chance to delete the messages. Am I going too far asking him to show me the account? Regardless of his reasoning for why he still has it on his phone and logged in recently, I still want to see if he has been in recent contact with anyone.

I'm going crazy about this. We only got back together this 3rd time because he stressed how much he loved and needed me in his life so I can't understand why he would still be logging in...

Can you summarize the given text in a few sentences?
<bot>: On/off boyfriend and I have recently been back together for 2 months. Saw that he logged into OkCupid 4 days ago. Need to know if I should get him to show me his account messages.