My boyfriend practices very sneaky behavior:

1. He deletes all text conversations, including mine, upon ending them. Remaining text logs include his mom, dad and sister. He says it’s a habit.
2. He rejects incoming calls but will immediately respond to incoming text messages. Tells me it’s because our time together is valuable.
3. If he does happen to answer an incoming call from an unsaved phone number he immediately & discreetly lowers the receiver volume. He had no excuse for that one. Said he won’t do it again.

I’ve never found anything incriminating. Two months into our six-month relationship he came to me crying and he admitted to have been lightly dealing with a girl since before we met. He ended it and showed me proof. That warranted some trust but the other behaviors raises red flags. What do I do?